Staged on mostly dirt and singletrack around Bear Creek and the Front Range foothills, The Bear Chase is known for being runnable and welcoming to first-time ultrarunners while still delivering plenty of elevation and scenery. Across the weekend you’ll find everything from a beginner-friendly 5K to the signature 100K and 50 Mile, all based out of Bear Creek Lake Park in Lakewood. The course is considered relatively fast by trail standards (with published gain figures by distance) and uses well-marked loops that keep aid stations within reach. If you want a big Colorado trail day without extreme technicality, this fall classic is hard to beat.
Races
100 km
50 miles
50 km
Half Marathon
10 km
5 km
Race Date:
04 October, 2025
The Bear Chase 100 K 2025, organized by Aravaipa Running, will be held on Saturday, 4 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. Runners tackle a challenging course of approximately 62.2 miles with around 4,250–4,336 ft of elevation gain, through fast yet rugged dirt and single-track trails with panoramic views of the Front Range.
Race Date:
04 October, 2025
The Bear Chase 50‑Mile 2025, hosted by Aravaipa Running, also takes place on Saturday, 4 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. Covering nearly 50 miles, this rugged desert ultra climbs roughly 3,400 ft over varied terrain that balances trail challenge with scenic reward.
Race Date:
04 October, 2025
The Bear Chase 50 K 2025, organised by Aravaipa Running, occurs on Saturday, 4 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. This 31-mile trail combines fast single-track with rolling hills and about 1,930 ft of elevation gain, making it strong yet accessible for aspiring ultrarunners.
Race Date:
05 October, 2025
The Bear Chase Half Marathon 2025, organised by Aravaipa Running, will be run on Sunday, 5 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. The primarily dirt-loops offer roughly 900 ft of climbing, scenic views, and a fast, beginner-friendly route through the park.
Race Date:
05 October, 2025
The Bear Chase 10 K (Baby Bear) 2025, hosted by Aravaipa Running, also occurs on Sunday, 5 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. This inviting ~6.2-mile trail features around 230 ft of elevation gain, a friendly loop perfect for less experienced runners, named for its just-right gentle challenge.
Race Date:
05 October, 2025
The Bear Chase 5 K 2025, organised by Aravaipa Running, will take place on Sunday, 5 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. This short ~3.1-mile trail run is mostly dirt single-track with mild hills, offering a quick but scenic taste of the ultra course.
Weather based on historical averages.
FAQs
What is the The Bear Chase 100km?
How long is the The Bear Chase 100km?
Where does the The Bear Chase 100km take place?
What is the elevation gain of the The Bear Chase 100km?
How can I prepare for the The Bear Chase 100km?
How do I choose the right training plan for the The Bear Chase 100km?
The Bear Chase 100 K 2025, organized by Aravaipa Running, will be held on Saturday, 4 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. Runners tackle a challenging course of approximately 62.2 miles with around 4,250–4,336 ft of elevation gain, through fast yet rugged dirt and single-track trails with panoramic views of the Front Range.
The The Bear Chase 100km is 100km long.
The The Bear Chase 100km takes place in Lakewood, CO, USA.
The The Bear Chase 100km elevation gain is 1322 metres, which Runna classifies as a Moderate race.
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 The Bear Chase 100km?
The Bear Chase 100 K 2025, organized by Aravaipa Running, will be held on Saturday, 4 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. Runners tackle a challenging course of approximately 62.2 miles with around 4,250–4,336 ft of elevation gain, through fast yet rugged dirt and single-track trails with panoramic views of the Front Range.
How long is the The Bear Chase 100km?
The The Bear Chase 100km is 100km long.
Where does the The Bear Chase 100km take place?
The The Bear Chase 100km takes place in Lakewood, CO, USA.
What is the elevation gain of the The Bear Chase 100km?
The The Bear Chase 100km elevation gain is 1322 metres, which Runna classifies as a Moderate race.
How can I prepare for the The Bear Chase 100km?
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 The Bear Chase 100km?
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 The Bear Chase 50 Mile?
How long is the The Bear Chase 50 Mile?
Where does the The Bear Chase 50 Mile take place?
What is the elevation gain of the The Bear Chase 50 Mile?
How can I prepare for the The Bear Chase 50 Mile?
How do I choose the right training plan for the The Bear Chase 50 Mile?
The Bear Chase 50‑Mile 2025, hosted by Aravaipa Running, also takes place on Saturday, 4 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. Covering nearly 50 miles, this rugged desert ultra climbs roughly 3,400 ft over varied terrain that balances trail challenge with scenic reward.
The The Bear Chase 50 Mile is 80km long.
The The Bear Chase 50 Mile takes place in Lakewood, CO, USA.
The The Bear Chase 50 Mile elevation gain is 1058 metres, which Runna classifies as a Moderate race.
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 The Bear Chase 50 Mile?
The Bear Chase 50‑Mile 2025, hosted by Aravaipa Running, also takes place on Saturday, 4 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. Covering nearly 50 miles, this rugged desert ultra climbs roughly 3,400 ft over varied terrain that balances trail challenge with scenic reward.
How long is the The Bear Chase 50 Mile?
The The Bear Chase 50 Mile is 80km long.
Where does the The Bear Chase 50 Mile take place?
The The Bear Chase 50 Mile takes place in Lakewood, CO, USA.
What is the elevation gain of the The Bear Chase 50 Mile?
The The Bear Chase 50 Mile elevation gain is 1058 metres, which Runna classifies as a Moderate race.
How can I prepare for the The Bear Chase 50 Mile?
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 The Bear Chase 50 Mile?
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 The Bear Chase 50km?
How long is the The Bear Chase 50km?
Where does the The Bear Chase 50km take place?
What is the elevation gain of the The Bear Chase 50km?
How can I prepare for the The Bear Chase 50km?
How do I choose the right training plan for the The Bear Chase 50km?
The Bear Chase 50 K 2025, organised by Aravaipa Running, occurs on Saturday, 4 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. This 31-mile trail combines fast single-track with rolling hills and about 1,930 ft of elevation gain, making it strong yet accessible for aspiring ultrarunners.
The The Bear Chase 50km is 50km long.
The The Bear Chase 50km takes place in Lakewood, CO, USA.
The The Bear Chase 50km elevation gain is 621 metres, which Runna classifies as a Moderate race.
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 The Bear Chase 50km?
The Bear Chase 50 K 2025, organised by Aravaipa Running, occurs on Saturday, 4 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. This 31-mile trail combines fast single-track with rolling hills and about 1,930 ft of elevation gain, making it strong yet accessible for aspiring ultrarunners.
How long is the The Bear Chase 50km?
The The Bear Chase 50km is 50km long.
Where does the The Bear Chase 50km take place?
The The Bear Chase 50km takes place in Lakewood, CO, USA.
What is the elevation gain of the The Bear Chase 50km?
The The Bear Chase 50km elevation gain is 621 metres, which Runna classifies as a Moderate race.
How can I prepare for the The Bear Chase 50km?
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 The Bear Chase 50km?
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 The Bear Chase Half Marathon?
How long is the The Bear Chase Half Marathon?
Where does the The Bear Chase Half Marathon take place?
What is the elevation gain of the The Bear Chase Half Marathon?
How can I prepare for the The Bear Chase Half Marathon?
How do I choose the right training plan for the The Bear Chase Half Marathon?
The Bear Chase Half Marathon 2025, organised by Aravaipa Running, will be run on Sunday, 5 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. The primarily dirt-loops offer roughly 900 ft of climbing, scenic views, and a fast, beginner-friendly route through the park.
The The Bear Chase Half Marathon is 21km long.
The The Bear Chase Half Marathon takes place in Lakewood, CO, USA.
The The Bear Chase Half Marathon elevation gain is 270 metres, which Runna classifies as a Moderate race.
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 The Bear Chase Half Marathon?
The Bear Chase Half Marathon 2025, organised by Aravaipa Running, will be run on Sunday, 5 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. The primarily dirt-loops offer roughly 900 ft of climbing, scenic views, and a fast, beginner-friendly route through the park.
How long is the The Bear Chase Half Marathon?
The The Bear Chase Half Marathon is 21km long.
Where does the The Bear Chase Half Marathon take place?
The The Bear Chase Half Marathon takes place in Lakewood, CO, USA.
What is the elevation gain of the The Bear Chase Half Marathon?
The The Bear Chase Half Marathon elevation gain is 270 metres, which Runna classifies as a Moderate race.
How can I prepare for the The Bear Chase 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 The Bear Chase 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 The Bear Chase 10km?
How long is the The Bear Chase 10km?
Where does the The Bear Chase 10km take place?
What is the elevation gain of the The Bear Chase 10km?
How can I prepare for the The Bear Chase 10km?
How do I choose the right training plan for the The Bear Chase 10km?
The Bear Chase 10 K (Baby Bear) 2025, hosted by Aravaipa Running, also occurs on Sunday, 5 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. This inviting ~6.2-mile trail features around 230 ft of elevation gain, a friendly loop perfect for less experienced runners, named for its just-right gentle challenge.
The The Bear Chase 10km is 10km long.
The The Bear Chase 10km takes place in Lakewood, CO, USA.
The The Bear Chase 10km elevation gain is 95 metres, which Runna classifies as a Moderate race.
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 The Bear Chase 10km?
The Bear Chase 10 K (Baby Bear) 2025, hosted by Aravaipa Running, also occurs on Sunday, 5 October 2025, at Bear Creek Lake Park in Lakewood, Colorado. This inviting ~6.2-mile trail features around 230 ft of elevation gain, a friendly loop perfect for less experienced runners, named for its just-right gentle challenge.
How long is the The Bear Chase 10km?
The The Bear Chase 10km is 10km long.
Where does the The Bear Chase 10km take place?
The The Bear Chase 10km takes place in Lakewood, CO, USA.
What is the elevation gain of the The Bear Chase 10km?
The The Bear Chase 10km elevation gain is 95 metres, which Runna classifies as a Moderate race.
How can I prepare for the The Bear Chase 10km?
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 The Bear Chase 10km?
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 The Bear Chase 5km?
How long is the The Bear Chase 5km?
Where does the The Bear Chase 5km take place?
What is the elevation gain of the The Bear Chase 5km?
How can I prepare for the The Bear Chase 5km?
How do I choose the right training plan for the The Bear Chase 5km?
The Bear Chase 5 K 2025, organised by Aravaipa Running, will take place on Sunday, 5 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. This short ~3.1-mile trail run is mostly dirt single-track with mild hills, offering a quick but scenic taste of the ultra course.
The The Bear Chase 5km is 5km long.
The The Bear Chase 5km takes place in Lakewood, CO, USA.
The The Bear Chase 5km elevation gain is 39 metres, which Runna classifies as a Rolling race.
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 The Bear Chase 5km?
The Bear Chase 5 K 2025, organised by Aravaipa Running, will take place on Sunday, 5 October 2025, at Bear Creek Lake Park, Lakewood, Colorado. This short ~3.1-mile trail run is mostly dirt single-track with mild hills, offering a quick but scenic taste of the ultra course.
How long is the The Bear Chase 5km?
The The Bear Chase 5km is 5km long.
Where does the The Bear Chase 5km take place?
The The Bear Chase 5km takes place in Lakewood, CO, USA.
What is the elevation gain of the The Bear Chase 5km?
The The Bear Chase 5km elevation gain is 39 metres, which Runna classifies as a Rolling race.
How can I prepare for the The Bear Chase 5km?
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 The Bear Chase 5km?
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
Park
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by The Bear Chase 2025 or Aravaipa Running. 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 The Bear Chase 2025 website.
