Colorado
Colorado Trail Running Calendar 2026-2027
Explore the best trail runs in Colorado for 2026-2027! Our updated list features 146 exciting trail runs across the region. Find your next trail run in Colorado below and join the trail community at these great events!
October 2027
A multi distance trail festival in Castle Rock featuring a Ridgeline 50K, shorter trail races and a family 1.2 mile adventure run with timing and post race amenities.
Trail race festival at Bear Creek Lake Park offering 100K, 50M, 50K, half, 10K and 5K on mostly dirt singletrack with aid stations and drop-bag support.
Trail run through Overend Mountain Park in Durango with a postrace chili cookoff; about 7 miles and roughly 1,500 ft of gain, benefiting The Good Food Collective.
Trail races in Sedalia, Colorado on October 16, 2027 offering 50 Mile, 55k, 15 Mile and 5 Mile courses across scenic montane singletrack.
Trail race at Bear Creek Lake Park on 10/16/2027 offering 5 and 10 mile courses on single-track and dirt with a post-run party and refreshments.
Trail races at Bear Creek Lake Park with 5 km, 15 km, a 5+15 double, and a Kids 1 km; mostly dirt single and double track with marked courses and an aid station on the 15 km.