Ultrapalooza 2025 returns on September 27–28, bringing runners to the scenic Flint Hills Trail rail‑trail in Osawatomie, Kansas, for one of the Midwest’s flattest and fastest ultrarunning events. The weekend lineup includes distances from 5 km through 100 miles, with out‑and‑back courses across crushed‑gravel trail winding through tallgrass prairies, river banks, and riparian woodlands — all part of the historic Santa Fe National Historic Trail. Aid stations are placed every 4–5 miles, each stocked with water, electrolyte drink, snacks, and gels; the start/finish zone buzzes with festivity, featuring live music, food trucks, a swag bag, and unique awards. With cutoff times ranging up to 30 hours for 100‑mile and 100 km races (12 hours for marathon/50 km, and 6 hours for the half marathon), strong volunteer support, and a welcoming atmosphere, this Kansas Super Slam Series event delivers a top-tier ultra experience.
Races
100 miles
100 km
50 miles
50 km
Marathon
Half Marathon
10 km
5 km
Race Date:
27 September, 2025
The 100‑Mile Ultra begins at 6:00 AM on Saturday, 27 September 2025, and follows a flat, fast crushed-gravel out‑and‑back course along the scenic Flint Hills Trail, with a generous 30‑hour cutoff, manned aid stations, and live music at the start/finish in Osawatomie, KS. Organized by Midwest Endurance Race Co., this event embraces prairie landscapes and community-energy at the hub trailhead.
Race Date:
27 September, 2025
The 100 km (≈62 mi) distance shares the same scenic Flint Hills Trail with minimal elevation and opens at 6:00 AM on 27 September 2025, offering a 30‑hour cutoff and equally supportive aid station coverage down to the river bluffs. It’s produced by Midwest Endurance Race Co. in Osawatomie, KS.
Race Date:
27 September, 2025
Also starting at 6:00 AM on the same morning, the 50 Miler is a mid-distance ultra with a 30‑hour cutoff, featuring the same historic Flint Hills Trail grazing through Kansas prairie and river environments. Hosted by Midwest Endurance Race Co., the event starts and finishes at Mile 0 trailhead, Osawatomie.
Race Date:
27 September, 2025
The 50 km race launches at 6:30 AM on Saturday, 27 September 2025, along the fast, crushed-gravel Flint Hills Trail with a 12‑hour cutoff, abundant aid every ~5 miles, and festival energy at the start/finish area. Organized by Midwest Endurance Race Co. in Kansas.
Race Date:
27 September, 2025
The Marathon begins at 6:30 AM on 27 September 2025, running on the same flat, scenic trail, with a 12‑hour cutoff, well-marked course, and trail-side river and prairie views. Hosted by Midwest Endurance Race Co., finishers enjoy food trucks and camaraderie at the Osawatomie trailhead hub.
Race Date:
27 September, 2025
Starting at 7:00 AM on Saturday, the Half Marathon offers runners a one-way stretch on the crushed-gravel Flint Hills Trail with a 6‑hour cutoff and minimal elevation—a perfect mid-distance for a scenic fall morning. Organized by Midwest Endurance Race Co. in Osawatomie, KS.
Race Date:
28 September, 2025
The 10 km distance takes place on Sunday morning, 28 September 2025, beginning at 7:00 AM, on the same flat, crushed-gravel trail used by the longer races. With a 3‑hour cutoff, it offers a fast and accessible fall trail experience from the Osawatomie hub.
Race Date:
28 September, 2025
The 5 km Fun Run, also on Sunday at 7:00 AM, is a beginner-friendly trail route along the prairie-lined Flint Hills Trail, with a 2‑hour cutoff and festive support at the finish. It is hosted by Midwest Endurance Race Co., offering music, cheering crowds, and food trucks at the Mile 0 start/finish area.
Weather based on historical averages.
FAQs
What is the Ultrapalooza 100 Miler?
How long is the Ultrapalooza 100 Miler?
Where does the Ultrapalooza 100 Miler take place?
What is the elevation gain of the Ultrapalooza 100 Miler?
How can I prepare for the Ultrapalooza 100 Miler?
How do I choose the right training plan for the Ultrapalooza 100 Miler?
The 100‑Mile Ultra begins at 6:00 AM on Saturday, 27 September 2025, and follows a flat, fast crushed-gravel out‑and‑back course along the scenic Flint Hills Trail, with a generous 30‑hour cutoff, manned aid stations, and live music at the start/finish in Osawatomie, KS. Organized by Midwest Endurance Race Co., this event embraces prairie landscapes and community-energy at the hub trailhead.
The Ultrapalooza 100 Miler is 161km long.
The Ultrapalooza 100 Miler takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza 100 Miler elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 100 Miler?
The 100‑Mile Ultra begins at 6:00 AM on Saturday, 27 September 2025, and follows a flat, fast crushed-gravel out‑and‑back course along the scenic Flint Hills Trail, with a generous 30‑hour cutoff, manned aid stations, and live music at the start/finish in Osawatomie, KS. Organized by Midwest Endurance Race Co., this event embraces prairie landscapes and community-energy at the hub trailhead.
How long is the Ultrapalooza 100 Miler?
The Ultrapalooza 100 Miler is 161km long.
Where does the Ultrapalooza 100 Miler take place?
The Ultrapalooza 100 Miler takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza 100 Miler?
Runna classifies the Ultrapalooza 100 Miler elevation profile as Flat.
How can I prepare for the Ultrapalooza 100 Miler?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza 100 Miler?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 100K?
How long is the Ultrapalooza 100K?
Where does the Ultrapalooza 100K take place?
What is the elevation gain of the Ultrapalooza 100K?
How can I prepare for the Ultrapalooza 100K?
How do I choose the right training plan for the Ultrapalooza 100K?
The 100 km (≈62 mi) distance shares the same scenic Flint Hills Trail with minimal elevation and opens at 6:00 AM on 27 September 2025, offering a 30‑hour cutoff and equally supportive aid station coverage down to the river bluffs. It’s produced by Midwest Endurance Race Co. in Osawatomie, KS.
The Ultrapalooza 100K is 100km long.
The Ultrapalooza 100K takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza 100K elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 100K?
The 100 km (≈62 mi) distance shares the same scenic Flint Hills Trail with minimal elevation and opens at 6:00 AM on 27 September 2025, offering a 30‑hour cutoff and equally supportive aid station coverage down to the river bluffs. It’s produced by Midwest Endurance Race Co. in Osawatomie, KS.
How long is the Ultrapalooza 100K?
The Ultrapalooza 100K is 100km long.
Where does the Ultrapalooza 100K take place?
The Ultrapalooza 100K takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza 100K?
Runna classifies the Ultrapalooza 100K elevation profile as Flat.
How can I prepare for the Ultrapalooza 100K?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza 100K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 50 Miler?
How long is the Ultrapalooza 50 Miler?
Where does the Ultrapalooza 50 Miler take place?
What is the elevation gain of the Ultrapalooza 50 Miler?
How can I prepare for the Ultrapalooza 50 Miler?
How do I choose the right training plan for the Ultrapalooza 50 Miler?
Also starting at 6:00 AM on the same morning, the 50 Miler is a mid-distance ultra with a 30‑hour cutoff, featuring the same historic Flint Hills Trail grazing through Kansas prairie and river environments. Hosted by Midwest Endurance Race Co., the event starts and finishes at Mile 0 trailhead, Osawatomie.
The Ultrapalooza 50 Miler is 80km long.
The Ultrapalooza 50 Miler takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza 50 Miler elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 50 Miler?
Also starting at 6:00 AM on the same morning, the 50 Miler is a mid-distance ultra with a 30‑hour cutoff, featuring the same historic Flint Hills Trail grazing through Kansas prairie and river environments. Hosted by Midwest Endurance Race Co., the event starts and finishes at Mile 0 trailhead, Osawatomie.
How long is the Ultrapalooza 50 Miler?
The Ultrapalooza 50 Miler is 80km long.
Where does the Ultrapalooza 50 Miler take place?
The Ultrapalooza 50 Miler takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza 50 Miler?
Runna classifies the Ultrapalooza 50 Miler elevation profile as Flat.
How can I prepare for the Ultrapalooza 50 Miler?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza 50 Miler?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 50K?
How long is the Ultrapalooza 50K?
Where does the Ultrapalooza 50K take place?
What is the elevation gain of the Ultrapalooza 50K?
How can I prepare for the Ultrapalooza 50K?
How do I choose the right training plan for the Ultrapalooza 50K?
The 50 km race launches at 6:30 AM on Saturday, 27 September 2025, along the fast, crushed-gravel Flint Hills Trail with a 12‑hour cutoff, abundant aid every ~5 miles, and festival energy at the start/finish area. Organized by Midwest Endurance Race Co. in Kansas.
The Ultrapalooza 50K is 50km long.
The Ultrapalooza 50K takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza 50K elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 50K?
The 50 km race launches at 6:30 AM on Saturday, 27 September 2025, along the fast, crushed-gravel Flint Hills Trail with a 12‑hour cutoff, abundant aid every ~5 miles, and festival energy at the start/finish area. Organized by Midwest Endurance Race Co. in Kansas.
How long is the Ultrapalooza 50K?
The Ultrapalooza 50K is 50km long.
Where does the Ultrapalooza 50K take place?
The Ultrapalooza 50K takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza 50K?
Runna classifies the Ultrapalooza 50K elevation profile as Flat.
How can I prepare for the Ultrapalooza 50K?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza 50K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza Marathon?
How long is the Ultrapalooza Marathon?
Where does the Ultrapalooza Marathon take place?
What is the elevation gain of the Ultrapalooza Marathon?
How can I prepare for the Ultrapalooza Marathon?
How do I choose the right training plan for the Ultrapalooza Marathon?
The Marathon begins at 6:30 AM on 27 September 2025, running on the same flat, scenic trail, with a 12‑hour cutoff, well-marked course, and trail-side river and prairie views. Hosted by Midwest Endurance Race Co., finishers enjoy food trucks and camaraderie at the Osawatomie trailhead hub.
The Ultrapalooza Marathon is 42km long.
The Ultrapalooza Marathon takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza Marathon elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza Marathon?
The Marathon begins at 6:30 AM on 27 September 2025, running on the same flat, scenic trail, with a 12‑hour cutoff, well-marked course, and trail-side river and prairie views. Hosted by Midwest Endurance Race Co., finishers enjoy food trucks and camaraderie at the Osawatomie trailhead hub.
How long is the Ultrapalooza Marathon?
The Ultrapalooza Marathon is 42km long.
Where does the Ultrapalooza Marathon take place?
The Ultrapalooza Marathon takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza Marathon?
Runna classifies the Ultrapalooza Marathon elevation profile as Flat.
How can I prepare for the Ultrapalooza Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza Half Marathon?
How long is the Ultrapalooza Half Marathon?
Where does the Ultrapalooza Half Marathon take place?
What is the elevation gain of the Ultrapalooza Half Marathon?
How can I prepare for the Ultrapalooza Half Marathon?
How do I choose the right training plan for the Ultrapalooza Half Marathon?
Starting at 7:00 AM on Saturday, the Half Marathon offers runners a one-way stretch on the crushed-gravel Flint Hills Trail with a 6‑hour cutoff and minimal elevation—a perfect mid-distance for a scenic fall morning. Organized by Midwest Endurance Race Co. in Osawatomie, KS.
The Ultrapalooza Half Marathon is 21km long.
The Ultrapalooza Half Marathon takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza Half Marathon elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza Half Marathon?
Starting at 7:00 AM on Saturday, the Half Marathon offers runners a one-way stretch on the crushed-gravel Flint Hills Trail with a 6‑hour cutoff and minimal elevation—a perfect mid-distance for a scenic fall morning. Organized by Midwest Endurance Race Co. in Osawatomie, KS.
How long is the Ultrapalooza Half Marathon?
The Ultrapalooza Half Marathon is 21km long.
Where does the Ultrapalooza Half Marathon take place?
The Ultrapalooza Half Marathon takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza Half Marathon?
Runna classifies the Ultrapalooza Half Marathon elevation profile as Flat.
How can I prepare for the Ultrapalooza Half Marathon?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza Half Marathon?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 10K?
How long is the Ultrapalooza 10K?
Where does the Ultrapalooza 10K take place?
What is the elevation gain of the Ultrapalooza 10K?
How can I prepare for the Ultrapalooza 10K?
How do I choose the right training plan for the Ultrapalooza 10K?
The 10 km distance takes place on Sunday morning, 28 September 2025, beginning at 7:00 AM, on the same flat, crushed-gravel trail used by the longer races. With a 3‑hour cutoff, it offers a fast and accessible fall trail experience from the Osawatomie hub.
The Ultrapalooza 10K is 10km long.
The Ultrapalooza 10K takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza 10K elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 10K?
The 10 km distance takes place on Sunday morning, 28 September 2025, beginning at 7:00 AM, on the same flat, crushed-gravel trail used by the longer races. With a 3‑hour cutoff, it offers a fast and accessible fall trail experience from the Osawatomie hub.
How long is the Ultrapalooza 10K?
The Ultrapalooza 10K is 10km long.
Where does the Ultrapalooza 10K take place?
The Ultrapalooza 10K takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza 10K?
Runna classifies the Ultrapalooza 10K elevation profile as Flat.
How can I prepare for the Ultrapalooza 10K?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza 10K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 5K?
How long is the Ultrapalooza 5K?
Where does the Ultrapalooza 5K take place?
What is the elevation gain of the Ultrapalooza 5K?
How can I prepare for the Ultrapalooza 5K?
How do I choose the right training plan for the Ultrapalooza 5K?
The 5 km Fun Run, also on Sunday at 7:00 AM, is a beginner-friendly trail route along the prairie-lined Flint Hills Trail, with a 2‑hour cutoff and festive support at the finish. It is hosted by Midwest Endurance Race Co., offering music, cheering crowds, and food trucks at the Mile 0 start/finish area.
The Ultrapalooza 5K is 5km long.
The Ultrapalooza 5K takes place in Osawatomie, KS, USA.
Runna classifies the Ultrapalooza 5K elevation profile as Flat.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Ultrapalooza 5K?
The 5 km Fun Run, also on Sunday at 7:00 AM, is a beginner-friendly trail route along the prairie-lined Flint Hills Trail, with a 2‑hour cutoff and festive support at the finish. It is hosted by Midwest Endurance Race Co., offering music, cheering crowds, and food trucks at the Mile 0 start/finish area.
How long is the Ultrapalooza 5K?
The Ultrapalooza 5K is 5km long.
Where does the Ultrapalooza 5K take place?
The Ultrapalooza 5K takes place in Osawatomie, KS, USA.
What is the elevation gain of the Ultrapalooza 5K?
Runna classifies the Ultrapalooza 5K elevation profile as Flat.
How can I prepare for the Ultrapalooza 5K?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Ultrapalooza 5K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
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Sport:
Running
Tags:
Nature
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Ultrapalooza 2025 or Midwest Endurance Race Co. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Ultrapalooza 2025 website.
