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Trail Running Calendar near Castle Rock 2026-2027

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Explore the top trail runs near Castle Rock for 2026-2027! We've gathered 25 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

October 2026
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 5K, 15K, a double combining 5K and 15K, and a kids 1K.
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
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.
June 2027
Jun
26
Sa

Rueter-Hess Trail Run

Trail Run 10 km
A trail event near Parker Colorado featuring a 10k with a stepped incline, a kids one mile on the same start, age and gender based staggered starts, aid stations on the loop, and volunteer entry options.
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