Trail Running calendar near Nederland 2024-2025

The Thumbs Up Vertical Challenge is an 8-hour ascent trail run taking place on December 7, 2024, in Estes Park, CO. Runners will ascend the Thumb Open Space trail, collecting poker chips at the turnaround point to determine their placing. Unique patches will be awarded at 3 milestones, with a specia..

The Santa's Summit Slam will take place in Estes Park on Saturday 14 December 2024. You can run 5 miles.

The Greenland Trail Races offer a variety of distances including a 50K, 25K, 8 Mile, and 4 Mile race on May 3, 2025, at Greenland Open Space in Larkspur, CO. Participants will enjoy a scenic course passing through grasslands, ponds, oak hills, and pine forests with views of Pikes Peak. The event pro..

The Endure Trail Runs, part of the Human Potential Running Series, offers a unique trail running experience with 12-Hour, 24-Hour, Half Marathon, and 10k options. Taking place in Mueller State Park in Divide, CO, the event challenges participants to run loops determined by colored balls for up to 12..

The Samson's Revenge will take place in Estes Park on Saturday 17 May 2025. You can run between 10 and 55 kilometers.

The Ol' College Try 24 Hour Ultra is Denver's first and only 24-hour Ultra Race, taking place on May 24th and 25th, 2025, at Auraria Campus. Participants can choose to run for 24hrs, 12hrs, or 6hrs, pushing their limits and aiming for personal bests. The event promises unforgettable memories, incred..

The Crazy Legs 10K+ Trail Run will take place in Loveland on Sunday 1 June 2025.

The Estes Park's Backyard Ultra will take place in Estes Park on Saturday 21 June 2025.