Quad Rock 25 & 50 Mile Trail Races
Welcome to the Quad Rock 50 & 25 Mile Trail Races, an event put on by trail runners for trail runners.
Taking place on the trails and hills west of Fort Collins in Lory State Park and Horsetooth Mountain Park, the Quad Rock loop will take you on a tour of the Fort Collins skyline, situated on the northeastern flanks of Colorado’s mighty Rocky Mountains. Look east from the course’s high ridges and you will see the Great Plains extending as far as the eye can see; look west and you will take in the layered ridgelines and summits of Northern Colorado’s Rocky Mountain swell, dominated 30 miles away by a towering Longs Peak.
We aspire to not only offer a first class trail racing experience on a challenging, scenic, and impeccably marked course, but also a top-notch, post-race experience that will leave your bellies full, your feet tapping and your mouths yapping.
All told, on the 25 mile loop you will ascend a touch over 5,500 vertical feet on more than 23 miles of premium Fort Collins singletrack connected by two miles of dirt road. Run the second loop in reverse for a full 50 miles and a net vertical gain in excess of 11,000 feet.
- Start: Lory State Park, Fort Collins, CO.
- Distance: 25 Miles (5,500') or 50 Miles (11,000')
- Min/Max Elevation: 5,444' / 7,087'
- Average Elevation: 6,200'
- Terrain: 85% singletrack, 15% dirt road
- Fauna: Abert squirrels, deer, black bears
- Registration Caps: 450 total (200 50mi / 250 25mi)
- Time Allowance: 50 mile - 14 hours; 25 mile - 12.5 hours
- Date: May 9, 2026
- Start Time: 50 mile: 5:30am; 25 mile: 7:00am
Welcome to the Quad Rock 50 and 25 mile trail races, an event put on by trail runners for trail runners.
Taking place on the trails and hills west of Fort Collins in Lory State Park and Horsetooth Mountain Park, the Quad Rock 25/50 will take you on a tour of the Fort Collins skyline, situated on the northeastern stretches of Colorado's mighty Rocky Mountains. Look east from the course's high ridges and you'll see the Great Plains extending into Nebraska as far as the eye can see. Look west and you'll take in summit views, dominated 30 miles away by a towering Longs Peak.