Articles

Belgian Ultrarunner Karel Sabbe's Record-Breaking Pacific Crest Trail Run Showcased in New YouTube Documentary

Explore Karel Sabbe's record-breaking Pacific Crest Trail run in a riveting documentary. Jour..

Trail Running: How it Can Help Reduce Stress and Anxiety

Trail running is an effective way to reduce stress, anxiety, and improve physical and mental he..

Trail Running vs. Road Running: Which One Is Right For You?

When it comes to running, there are two primary options to choose from: trail running and road..

Blue Sky Trail Marathon

Name: Blue Sky Trail Marathon
Start: 2025-10-18
End: 2025-10-19
Location: Fort Collins

Fort Collins, United States • 18-19 Oct 2025

The Blue Sky Trail Marathon and Half Marathon will take place on October 18-19, 2025, in Fort Collins, Colorado. This event features a challenging 26.7-mile marathon and a 13.1-mile half marathon, both set against the stunning backdrop of the Colorado Rockies. The courses traverse a mix of dirt singletrack and rocky trails, with significant elevation gains, making it suitable for both experienced trail runners and newcomers. Participants can enjoy well-stocked aid stations, a post-race BBQ, and unique finisher awards. Registration opens on December 15, 2024, with a cap of 600 runners for the marathon. Visit the organization's website for the most recent information.

United States Colorado Fort Collins

Race information

Website

26 mi

3500 m+

Marathon

13 mi

2600 m+

Half Marathon

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Mar 8

Lucky Lyons

Lyons - 26 mi from Fort Collins

5 km

10 km

Lucky Lyons is a St. Patrick’s Day running event featuring 5K and 10K races set in the scenic paths of Lyons, Colorado. Scheduled for March 8, 2025, participants are encouraged to wear their best green attire to celebrate the occasion.The courses include a mix of paved, gravel, and dirt paths, provi..

Fri - Sat Apr 4-5

Run The Ranch

Loveland - 14 mi from Fort Collins

...

Run The Ranch is an exciting trail running event taking place at Sylvan Dale Guest Ranch in Loveland, Colorado. Scheduled for April 4-5, 2025, participants can choose from various distances, including a 5K, 10K, and multiple timed trail runs ranging from 4 to 12 hours, with options for solo and rela..

Saturday May 10

Quad Rock 50

Fort Collins

25 mi

50 mi

The Quad Rock 50 and 25 mile trail races, organized by Gnar Runners, will take place in Lory State Park and Horsetooth Mountain Park near Fort Collins, Colorado. This event offers participants a challenging course with stunning views of the Rocky Mountains and the Great Plains. The 50-mile race feat..

Saturday May 17

Samson's Revenge

Estes Park - 27 mi from Fort Collins

10 km

27 km

55 km

Samson's Revenge is a trail running event held at the YMCA of the Rockies in Estes Park, Colorado, honoring the legacy of Samson, a famous elk poached in 1995. Participants can choose from three race distances: 10K, 27K, and 55K, featuring a challenging course with significant elevation gain, partic..

Fri - Sun May 23-25

Weld Your Mettle Running Festival

Eaton - 20 mi from Fort Collins

Backyard Ultra

...

The Weld Your Mettle Running Festival is a vibrant event taking place over a weekend in May 2025 in Eaton, Colorado. It features a variety of running challenges, including timed relays (3, 6, 9, 12, and 24 hours), a 7K Ruck, and a 1 Mile Kids Fun Run. Participants can enjoy camping options, includin..

Sunday Jun 1

Crazy Legs Trail Run

Loveland - 14 mi from Fort Collins

10 km

The Crazy Legs 10k+ Trail Run is an exciting running event taking place at Devil’s Backbone Open Space in Loveland, Colorado. Scheduled for June 1, 2025, this trail run features a challenging course marked by flour arrows, with water stops provided along the way. Participants can enjoy a unique expe..