Idaho Springs
Trail Running Calendar near Idaho Springs 2026-2027
Explore the top trail runs near Idaho Springs 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
An approximately 18 mile trail across Boulder's five peaks with about 5,000 ft of climbing on October 24, 2026; limited to 100 participants with a $25 fee donated to recovery.
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.
A backyard ultra at Bear Creek Lake Park where runners repeat a 4.167 mile loop every hour until one remains, up to 11 laps, with a 50 runner field cap.
November 2026
Trail races in Louisville, Colorado on November 14, 2026 offering 13.1 miles, 10K and 5K out-and-back courses on dirt trails with aid stations and drop bag service.
A 50K looped ultra near Golden, CO visiting four peaks from Parfet Park with an unmarked, self supported course and no entry fee.
December 2026
Holiday trail runs in Louisville CO with 5k, 10k, a new half marathon, expo pickup, giveaways, family activities, and a visit from Santa.
February 2027
May 2027
Trail ultramarathon in Buffalo Creek, Colorado offering 50 Mile and 50K on soft singletrack with aid stations, limited crew access and live tracking.
July 2027
A 69 mile, three loop mountain endurance near Nederland, Colorado with about 18,099 ft of climbing, three weight categories and mandatory high altitude equipment.
Two Brothers Up and Down in Idaho Springs features steep out and back courses: a 10k with about 1,800 ft ascent and a 5k with about 570 ft.
August 2027
Annual four mile charity run in Eldorado Springs with a scenic out and back course, post-run food and prizes, supporting the Colorado Cancer Foundation.
Mountain trail races in Winter Park Colorado featuring 50K, 21K and 10K courses on alpine singletrack with limited fields and aid stations.
Trail races around Standley Lake in Westminster, Colorado offering five dirt-course distances with aid stations, drop bag access and live split tracking.