Flatrock 101

Independence, United States • 18 Apr 2026

FlatRock 101 is a renowned trail ultramarathon held near Independence, Kansas, featuring distances of 101K, 50K, 25K, 12K, and 5K. As the oldest trail ultra in Kansas, it offers a challenging double out-and-back course along the scenic Elk River Hiking Trail, characterized by limestone bluffs, rock formations, and mostly single-track, rocky terrain without long hills. The event includes multiple aid stations stocked with water, electrolytes, and snacks. It is part of the FlatRock Triple Crown Series, which rewards runners completing three challenging races. The race atmosphere is supportive, with pre-race dinners and volunteer appreciation programs enhancing the experience. Visit the organization's website for the most recent information.

Race information

101 km
101k
50 km
50k
25 km
25k
12 km
12k
5 km
Visit the organization's website for the most recent information.
Trail runs nearby

FlatRock is a renowned trail running event held at Elk City Lake near Independence, Kansas, featuring distances of 50K, 25K, 12K, and 5K. Known as the oldest trail ultra in Kansas, the race offers a challenging, technical single-track course along the Elk River Hiking Trail, showcasing unique limest..

Outlaw WinterRock is a trail running event held at Elk City Lake in Independence, Kansas, featuring 25K and 12K distances. The course is a technical, mostly single-track out-and-back route along the Elk River Hiking Trail, winding through limestone bluffs, rock formations, and scenic vistas. Aid sta..