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Flatrock 101

Independence, United States • 27 Sep 2025

FlatRock in Independence, Kansas offers a rugged, historic trail ultramarathon series on the Elk River Hiking Trail. FlatRock is the first and oldest trail ultra in Kansas. Distances include 50K, 25K, 12K and 5K, with a challenging, single-track out-and-back course through limestone bluffs, rock formations, and scenic vistas.

The event features a FlatRock Triple Crown series—WinterRock 25K, FlatRock101K, and FlatRock50K—with a special award for finishers who complete all three. Aid stations provide water, electrolyte drinks; soups and sandwiches; multiple checkpoints. Pre-race dinner, photos, and volunteer and military discounts add to the community atmosphere.

Race headquarters are at the Outlet Channel Shelter near Elk City Lake. Visit the organization's website for the most recent information.

United States Kansas Independence

Race information

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

WinterRock

Independence

WinterRock, held in Independence, KS, offers 25K and 12K options along the Elk River Hiking Trail from the Outlet Channel Shelter. The route is technical and predominantly single-track, an out-and-back through limestone bluffs, rock formations, and scenic vistas. The event features a lean, unmanned..

Flatrock 101

Independence

...

FlatRock 101 is a trail ultramarathon held near Independence, Kansas at Elk City Lake. The race offers 101K, 50K, 25K, 12K, and 5K distances. The course is a double out-and-back along the Elk River Hiking Trail, winding through limestone bluffs, rock formations, and scenic single-track with rocky fo..