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Trail Running Calendar near Chatfield Reservoir 2026-2027

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Explore the top trail runs near Chatfield Reservoir for 2026-2027! We've gathered 28 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

Trail Running Calendar United States
October 2026
Oct
17
Sa

Trail Apples

Trail Run 4 mi 8 mi 12 mi
Oct
25
Su

Beware The Bear Trail Races

Trail Run 5 km 15 km 20 km
Trail races at Bear Creek Lake Park on Oct 25 2026 featuring 5 km, 15 km, a 5+15 double and a Kids 1 km. Mostly dirt single and double track with steep climbs, marked courses and included postrace items for adult distances.
November 2026
Nov
7
Sa

HRCA Backcountry Wilderness Half Marathon

Trail Run 13 mi
Experience 13.1 miles of singletrack trails and hills in the Highlands Ranch Backcountry Wilderness Area. Enjoy custom medals and a post race pancake breakfast while competing for cash prizes in various categories.
December 2026
Dec
5
Sa

Sawmill Trail Runs

Trail Run 50 km
Dec
5
Sa

Kingfisher Half Marathon

Trail Run 5 km 10 km Half Marathon
January 2027
Jan
24
Su

Freakin Freezin 5K - Denver

Trail Run 5 km
Freakin Freezin 5K in Denver on January 24, 2027 offers in-person and virtual 5K options with finisher medals and multiple overall and age-group awards.
March 2027
Mar
20
Sa

Far Out 3/4 Marathon

Trail Run 5 km 10 mi 32 km
May 2027
May
1
Sa

Greenland Trail Races

Trail Run 4 mi 8 mi 25 km 50 km
Trail races at Greenland Open Space near Larkspur offer four dirt-trail distances with looped courses, aid stations, timing, and awards.
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