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Trail Running Calendar near Douglas County 2026-2027

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Explore the top trail runs near Douglas County for 2026-2027! We've gathered 27 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

December 2026
Dec
5
Sa

Kingfisher Half Marathon

Trail Run 5 km 10 km Half Marathon
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.
May
1
Sa

Niwot's Challenge

Trail Run 24 mi 50 mi 100 mi
An invitation-only ultrarunning trial in Sedalia, Colorado emphasizing off-trail navigation, self-reliance, and multi-loop endurance challenges with a 40-runner field.
May
15
Sa

Endure Trail Runs

Backyard Ultra 7 mi 14 mi 27 mi
Trail races at Mueller State Park from 10k to marathon plus two 12 hour timed events that use colored ball draws to set loop sequences. All courses are single and double track with no pavement and feature an aid station.
July 2027
Jul
18
Su

Barr Trail Mountain Race

Trail Run 13 mi
A 12.6 mile mountain trail race on Pikes Peak that ascends to Barr Camp and returns, part of the Garden to Peak Challenge and operated under a Pike National Forest permit.
August 2027
Aug
14
Sa

Pat's Pony Express

Trail Run 8 mi 16 mi
Trail races at Rampart Reservoir offering 16 mile and 8 mile courses, shuttle service from Merit Academy, limited parking at Rainbow Gulch, horseshoe finisher medals and a membership raffle.
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