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Flatrock 101

Independence, United States • 18 Apr 2026

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 footing and no long hills.

The event highlights Kansas trail heritage and the FlatRock Triple Crown; finishing all three races (WinterRock 25K, FlatRock101K, and FlatRock 50K) earns a unique award after a 176K journey. There are 15 aid stations for the 101K, a pre-race spaghetti dinner, and complimentary race photos by Mile 90 Photography. Trekking poles allowed; dogs on leash; race rules apply. Visit the organization's website for the most recent information.

United States Kansas Independence

Race information

Registration
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 101

Independence

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 for..

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..