Location: Brookville, Kansas
Located on the Prairie Trail Scenic Byway northwest of Marquette about 5 miles north of Kanopolis Reservoir and State Park, 3 miles west of K-141 on Avenue K, a county road or south of K-140 from Caneiro on 25th Road
Mushroom Rock is the smallest, but one of the most unique, state parks in Kansas. The park is only 5 acres but boasts some of the most unusual rock formations anywhere. The rocks served as meeting places and landmarks for Native Americans and early pioneers.
Resembling giant mushrooms rising above the horizon, the Dakota formations of Mushroom Rock State Park are the remains of beach sands and sediments of the Cretaceous Period. The concretions that make up Mushroom Rocks are cemented calcium carbonate. The largest rock measures 27 feet in diameter.