Returning on March 28, 2026, the Chubb Trail Races—also known as the Double Chubb—invite ultrarunners and trail enthusiasts to the rocky and rolling paths of West Tyson County Park near St. Louis. Participants can choose from 50K, 25K, or 8-mile distances on an out-and-back course that includes steep hill climbs, wooded singletrack, and fast descents, with no water crossings (though route reroutes may occur in the case of flooding). The race offers chip timing, aid stations stocked with trail fuel, a generous 9-hour cutoff, and a low-key, supportive trail-running culture. The event is cup-free, so runners must bring their own hydration gear, and proceeds go toward local trail maintenance and community initiatives. Packet pickup is available the day before, and the race consistently sells out due to its cult status in the Midwest trail-running scene.
Races
50 km
25 km
8 Miles
Race Date:
28 March, 2026
The 50K on March 28, 2026 navigates two out-and-back loops along the scenic Chubb Trail at West Tyson County Park, offering runners a challenging mix of gravel, rolling trails, and climbs, organized by the St. Louis Ultrarunners Group.
Race Date:
28 March, 2026
The 25K—also on March 28, 2026—covers one out-and-back loop of the same terrain, including river-adjacent paths and hilly sections, put on by the St. Louis Ultrarunners Group.
Race Date:
28 March, 2026
The 8‑Mile option on the same day follows an abbreviated loop of the Chubb Trail, ascending through wooded paths, crossing train tracks, and looping back to the park entrance—another course challenge hosted by the St. Louis Ultrarunners Group.
Weather based on historical averages.
FAQs
What is the Chubb Trail Race 50K?
How long is the Chubb Trail Race 50K?
Where does the Chubb Trail Race 50K take place?
What is the elevation gain of the Chubb Trail Race 50K?
How can I prepare for the Chubb Trail Race 50K?
How do I choose the right training plan for the Chubb Trail Race 50K?
The 50K on March 28, 2026 navigates two out-and-back loops along the scenic Chubb Trail at West Tyson County Park, offering runners a challenging mix of gravel, rolling trails, and climbs, organized by the St. Louis Ultrarunners Group.
The Chubb Trail Race 50K is 50km long.
The Chubb Trail Race 50K takes place in Eureka, MO, USA.
The Chubb Trail Race 50K elevation gain is 1219.2 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized 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 personalized 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 Chubb Trail Race 50K?
The 50K on March 28, 2026 navigates two out-and-back loops along the scenic Chubb Trail at West Tyson County Park, offering runners a challenging mix of gravel, rolling trails, and climbs, organized by the St. Louis Ultrarunners Group.
How long is the Chubb Trail Race 50K?
The Chubb Trail Race 50K is 50km long.
Where does the Chubb Trail Race 50K take place?
The Chubb Trail Race 50K takes place in Eureka, MO, USA.
What is the elevation gain of the Chubb Trail Race 50K?
The Chubb Trail Race 50K elevation gain is 1219.2 meters, which Runna classifies as a Hilly race.
How can I prepare for the Chubb Trail Race 50K?
The best way to train for the next race is to use a personalized 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 Chubb Trail Race 50K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Chubb Trail Race 25K?
How long is the Chubb Trail Race 25K?
Where does the Chubb Trail Race 25K take place?
What is the elevation gain of the Chubb Trail Race 25K?
How can I prepare for the Chubb Trail Race 25K?
How do I choose the right training plan for the Chubb Trail Race 25K?
The 25K—also on March 28, 2026—covers one out-and-back loop of the same terrain, including river-adjacent paths and hilly sections, put on by the St. Louis Ultrarunners Group.
The Chubb Trail Race 25K is 25km long.
The Chubb Trail Race 25K takes place in Eureka, MO, USA.
The Chubb Trail Race 25K elevation gain is 609.6 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized 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 personalized 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 Chubb Trail Race 25K?
The 25K—also on March 28, 2026—covers one out-and-back loop of the same terrain, including river-adjacent paths and hilly sections, put on by the St. Louis Ultrarunners Group.
How long is the Chubb Trail Race 25K?
The Chubb Trail Race 25K is 25km long.
Where does the Chubb Trail Race 25K take place?
The Chubb Trail Race 25K takes place in Eureka, MO, USA.
What is the elevation gain of the Chubb Trail Race 25K?
The Chubb Trail Race 25K elevation gain is 609.6 meters, which Runna classifies as a Hilly race.
How can I prepare for the Chubb Trail Race 25K?
The best way to train for the next race is to use a personalized 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 Chubb Trail Race 25K?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Chubb Trail Race 8M?
How long is the Chubb Trail Race 8M?
Where does the Chubb Trail Race 8M take place?
What is the elevation gain of the Chubb Trail Race 8M?
How can I prepare for the Chubb Trail Race 8M?
How do I choose the right training plan for the Chubb Trail Race 8M?
The 8‑Mile option on the same day follows an abbreviated loop of the Chubb Trail, ascending through wooded paths, crossing train tracks, and looping back to the park entrance—another course challenge hosted by the St. Louis Ultrarunners Group.
The Chubb Trail Race 8M is 12km long.
The Chubb Trail Race 8M takes place in Eureka, MO, USA.
The Chubb Trail Race 8M elevation gain is 396.24 meters, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalized 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 personalized 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 Chubb Trail Race 8M?
The 8‑Mile option on the same day follows an abbreviated loop of the Chubb Trail, ascending through wooded paths, crossing train tracks, and looping back to the park entrance—another course challenge hosted by the St. Louis Ultrarunners Group.
How long is the Chubb Trail Race 8M?
The Chubb Trail Race 8M is 12km long.
Where does the Chubb Trail Race 8M take place?
The Chubb Trail Race 8M takes place in Eureka, MO, USA.
What is the elevation gain of the Chubb Trail Race 8M?
The Chubb Trail Race 8M elevation gain is 396.24 meters, which Runna classifies as a Hilly race.
How can I prepare for the Chubb Trail Race 8M?
The best way to train for the next race is to use a personalized 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 Chubb Trail Race 8M?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized 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 Chubb Trail Races 2026 or St. Louis Ultrarunners Club. 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 Chubb Trail Races 2026 website.
