Trail Running calendar near Jelm Mountain 2025-2026

We have found 23 Trailruns within 80 miles of Jelm Mountain. See below where and when you can find the races.

The Eltuck Valley 12K is part of the Lory Summer Trail Series held at Lory State Park in Bellvue, Colorado. This midweek trail race series offers a range of distances from 5K to 12K, catering to both new and experienced trail runners. The August 26 race features a fast and flat 12K course along the..

Front Range Ultra Dayze is a multi-day ultra-running festival in Loveland, Colorado, centered at Centennial Park and the River’s Edge Natural Area. Event distances range from 200-mile to 50k, plus timed formats up to 100+ hours, with a 200-runner cap. The flat, fast 2-mile loop traverses mostly dirt..

The Calarat Challenge Trail Running Festival takes place in Jamestown, Colorado, at the Cal-Wood Education Center, a nonprofit dedicated to outdoor education. Held over Labor Day weekend, the event features multiple trail races including a half marathon, 10K, 5K, Kids 1K, and combination races like..

The 10k @ 10,000 Feet is a challenging trail running event held at the summit of Rabbit Ears Pass near Steamboat Springs, Colorado. Known for its breathtaking mountain scenery, the race features a course starting at 10,000 feet elevation, with about 1,200 feet of elevation gain and loss. The main ra..

September 2025

American Heroes Run takes place in Longmont, Colorado, on a flat, fast loop course of about 1.05 miles. The event features multiple distances, including a 100-mile race (with a 30-hour cutoff), a 24-hour option, marathon, half-marathon, 9.11-mile, and 5K, plus shorter time-limited runs. The atmosphe..

Black Squirrel Half Marathon is a trail race set on the Lory State Park trails, northwest of Fort Collins in Bellvue, Colorado. The half marathon courses a 13.5-mile loop around the park, starting and finishing at Soldier Canyon, with roughly 2,000 feet of total climb and descent. The route includes..

Run Rabbit Run is a challenging ultramarathon event held in Steamboat Springs, Colorado, featuring 50-mile and 100-mile races through the scenic Routt National Forest. The 50-mile course starts at the Steamboat Springs ski area (6,900 ft elevation), ascending to Mount Werner (10,568 ft), crossing th..

Jelm Mountain Run, held near Jelm, Wyoming, offers a 10-mile out-and-back and a 50k (three laps of the same course). The route climbs from about 7,618 feet to the Infrared Observatory atop Jelm Mountain at over 9,600 feet, with more than 2,000 feet of total elevation gain, on improved jeep roads wit..

Snow Mountain Ranch Trail Race, held at the YMCA of the Rockies in Granby, Colorado, offers distances for all levels: 50K (31.4 miles), 33K (20.2 miles), Half Marathon (12.8 miles), 10K (6.1 miles), and 5K (3.3 miles). The courses are 100% dirt, featuring out-and-back and looping designs through rol..

Red Feather Trail Jamboree is a three-day trail running weekend held near Red Feather Lakes, Colorado, starting from the Ben Delatour Scout Ranch. Runners can tackle three distances: 50 miles (≈8,500 ft of gain), 50K (≈4,200 ft), and a Half Marathon (≈1,700 ft), with a 3-day Challenge totaling about..

The Emerald Mountain Trail Run takes place in Steamboat Springs, Colorado, offering two race distances: a 12k (approximately 7.75 miles) and a 4-mile run. The scenic course starts at the base of Howelsen Hill and winds through aspen-lined single-track trails on Emerald Mountain. The event welcomes h..

October 2025

Rocky’s Backyard Ultra is held at the YMCA of the Rockies Estes Park Center in Estes Park, Colorado. Runners must complete 4.167 miles in under one hour each lap, with the field reduced to a single finisher as the race continues until no others remain. The course loops around the boundary of RMNP on..

Blue Sky Trail Marathon & Half takes place in Fort Collins, Colorado, on the trails between Horsetooth Mountain Park and the Devil’s Backbone Open Space. Runners choose between the Blue Sky Marathon (26.7 miles with about 3,500 feet of elevation gain/loss) and the Blue Sky Half (13.4 miles with abou..

November 2025

Colorado 24 Hour Run takes place in Fort Collins, Colorado, at 4927 E. County Road 36. The event offers multiple distance options: 24-hour, 12-hour, and 6-hour races, plus 24-hour, 12-hour, and 6-hour relays.Runners complete laps on a one-mile dirt loop—the flat, scenic loop you’ll find in Colorado—..

December 2025

The Thumbs Up Vertical Challenge is an 8-hour ascent race held in Estes Park, Colorado, on the Thumb Open Space trail. Participants repeatedly run a 1 km out-and-back course with a 540-foot elevation gain per ascent. Runners collect poker chips at the turnaround point to track their completed ascent..

January 2026

The USCSA Cross Country Ski Racing Festival, hosted by Colorado Mesa University, takes place at Snow Mountain Ranch Nordic Center in Granby, Colorado. Scheduled for January 24-25, 2026, this event features collegiate and junior racers competing in classic and skate sprint races. Distances include 15..

April 2026

Race The Ranch is a winter snowshoe race held in Granby, Colorado on the Snow Mountain Ranch YMCA property. It offers three distances: 5k (1 lap), 25k (2 laps), and 50k (4 laps), designed to accommodate runners of all levels. The course combines singletrack, doubletrack, and groomed snowshoe trails,..

Run the Ranch is an annual trail running event held at the scenic Sylvan Dale Guest Ranch in Loveland, Colorado. The race offers a variety of distances including 5K, 10K, and timed trail runs of 4, 6, and 12 hours, with options for solo runners and 4-person relay teams. Participants run on private r..

The Great Western Trail Race, held in Severance, Colorado, offers a variety of running events including a 5K, 10K, half marathon, and a Kids Fun Run. Scheduled for April 18, 2026, this race welcomes participants to enjoy spring racing in a scenic community park setting. The event features chip timin..

May 2026

The Weld Your Mettle Running Festival, held in Eaton, Colorado, is a multi-day event featuring a variety of running challenges for all levels. Participants can choose from solo or relay races lasting 3, 6, 9, 12, 24, or 36 hours, including a 100-mile ultra with a 36-hour limit. Unique formats like t..