Derby
Trail Running Calendar near Derby 2026-2027
Explore the top trail runs near Derby for 2026-2027! We've gathered 23 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
August 2026
A community trail event at the Arapahoe County Fairgrounds on 08/29/2026 with a 5K run, a family 5K walk that allows leashed dogs, and a kids 1 mile plus demonstrations, vendors, and a pancake breakfast.
Free timed 5K in Lafayette at Waneka Lake with nearby parking; strollers allowed, dogs restricted, and concessions and T shirt sales support the Centaurus Cross Country Team.
September 2026
Join the community for a 5K run or walk on a brand new dirt course at the North Arvada Middle School Athletic Complex. Support local high school racers before taking on this off road route yourself.
Multi-distance running weekend in Longmont, CO on a flat 1.05-mile loop, offering in-person and virtual options plus awards and on-site aid.
October 2026
A multi-distance trail weekend at Bear Creek Lake Park offering 100K to 5K courses on mostly singletrack with aid stations, drop bags, pacer rules and live split tracking.
OUTLAST Denver is a six hour trail challenge where runners complete a 5K every hour, earn patches or a medal for laps, and can place on a national leaderboard.
Run the Rocks at Red Rocks Park in Morrison, CO offers a 5k and a 1.3-mile family course, raising funds for lung disease education, advocacy and research in Colorado.
Indian Creek Trail Runs in Sedalia, Colorado on October 17, 2026 offers multiple trail and ultra distances through montane forests, aspen groves, red rock formations and prairie vistas with city views from several viewpoints.
A backyard ultra at Luvin Arms Animal Sanctuary on Oct 24–25, 2026 with hourly 4.167-mile loops on mostly flat dirt, grass, and gravel plus on-site race camp and cupless aid.
MonsterDASH Louisville on Oct 25, 2026 offers a new half marathon plus 5k, 10k and a kids mile with costume contests, expo, and themed runner perks.