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 2026
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.
Trail races in Palmer Park Colorado Springs offering 50K, 25K, 10K and 5K on marked single track with city and Pikes Peak views.
Trail marathon and half near Fort Collins along redstone singletrack and technical rock sections, with stocked aid stations, drop bag options, and caps of 400 entries per distance.
Trail races at Bear Creek Lake Park offering 5 miles or a two-lap 10 miles on single-track dirt. Registration includes park admission, a finisher meal and refreshments; 10 mile finishers receive a commemorative mug.
A 2 mile event on 10/17/2026 in Fruita CO where participants pick a pumpkin included with entry then carry it across a course of fields, forests and hay bales.
Four trail races across Colorado Springs parks with increasing distances and chip-timed series awards for runners who complete all four events.
Methodist Mountain Ultra
The Methodist Mountain Ultra (MMU) is a trail race set on the Methodist Mountain trail system near Salida, Colorado. It takes place at the northern end of the Sangre de Cristo mountains. The event features two distances: a 30..
Single-loop trail races in Cañon City on October 24, 2026, from 10K to 50K, featuring Tunnel Drive, a climb to 7,109 ft, Royal Gorge views and well stocked aid stations.
Trail races at Bear Creek Lake Park on Oct 25, 2026, featuring 5K, 15K, a double combining 5K and 15K, and a kids 1K.
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 Halloween themed 5k and 10k through historic downtown Erie and Coal Creek trails, with a kids Goblin Run and BOLDERBoulder qualifier status. The event supports the Erie Optimist Club as its primary fundraiser.
November 2026
Four trail races across Colorado Springs parks with increasing distances and chip-timed series awards for runners who complete all four events.
Trail ultramarathon in Fruita, Colorado with multiple distance options from 10 miles to 50 miles, singletrack terrain, high desert views, and cupless aid stations with refill points.
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.
Timed 6-, 12- and 24-hour running and relay events on a certified 1.0002 mile dirt loop at Colorado Youth Outdoors Swift Ponds in Fort Collins, with full-service aid every lap and locker-style lodge support nearby.
VO2Max 3K OCR in Colorado Springs on Nov 7, 2026 features an indoor/outdoor 3K course with 15 to 20 obstacles and finisher medals and t shirts.
Trail races at Starsmore Visitor & Nature Center on November 8, 2026, with chip-timed 4-mile and untimed 2.5-mile courses on Columbine Trail; proceeds support Friends of Cheyenne Cañon and leashed pets are allowed on the trail.
Trail races in Louisville Colorado offering a half marathon, 10K and 5K on dirt trails with views of the Flat Irons and on course aid stations.
Four trail races across Colorado Springs parks with increasing distances and chip-timed series awards for runners who complete all four events.
A winter trail event in Colorado Springs offering 50k, half marathon, and 10k courses that start at Bear Creek Regional Park. Trails include historic High Drive and Gold Camp Road with stocked aid stations and crew accessible points.