Five loops through Denver's backyard park — a beginner-friendly 100K with real course records
Other trail races within 31 miles
A five-loop journey through Bear Creek Lake Park on Denver's Front Range, the Bear Chase 100K is one of Colorado's most approachable 100K courses. Five repeating 12.5-mile Orange loops keep runners returning to a fully stocked Start/Finish area, making crew access and pacing logistics straightforward. With 99% smooth singletrack dirt trail and under 4,400 feet of total gain, the course rewards consistency over technical skill — though October conditions can bring cold nights and variable weather that test finishing runners.
Some ultra experience recommended
Lakewood, CO, United StatesOctober 03, 2026
| Location | Mile | Elevation |
|---|---|---|
Start Start | 0.0 | 5,699 ft |
Homestead Aid Aid Station | 5.3 | 5,512 ft |
Cattail Creek Aid Aid Station | 8.8 | 5,712 ft |
Start / Finish Aid Station | 12.4 | 5,699 ft |
Homestead Aid Aid Station | 17.7 | 5,512 ft |
Cattail Creek Aid Aid Station | 21.2 | 5,712 ft |
Start / Finish Aid Station | 24.8 | 5,699 ft |
Homestead Aid Aid Station | 30.1 | 5,512 ft |
Cattail Creek Aid Aid Station | 33.7 | 5,712 ft |
Start / Finish Aid Station | 37.3 | 5,699 ft |
Homestead Aid Aid Station | 42.6 | 5,512 ft |
Cattail Creek Aid Aid Station | 46.1 | 5,712 ft |
Start / Finish Aid Station | 49.7 | 5,699 ft |
Homestead Aid Aid Station | 55.0 | 5,512 ft |
Cattail Creek Aid Aid Station | 58.6 | 5,712 ft |
Finish Finish | 62.3 | 5,699 ft |
Sign in to see cutoffs, crew access, drop bags, and services for every aid station.
Running with dogs is not permitted. Well-behaved leashed dogs are allowed with crew and spectators.
October nights in Lakewood can drop to near-freezing; 100K runners will be finishing after dark and should carry warm layers.
Colorado fall weather is unpredictable — temperature swings from warm afternoon sun to cold evenings within a single race are common.
No required gear specified
No recommended gear specified
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