Osage County is home to many walking, biking, and riding trails apart of the Flint Hills Trail, Landon Trail, and Santa Fe Trail.
Some trailhead locations:
Flint Hills Trail
https://kanzatrails.org/flint-hills-nature-trail/access-points/
S. Davis Road (4 MIles W. of Osage City)
Front Street (Vassar)
k-368 (SE of Vassar)
K-68 (North of Quenemo)
Landon Trail
https://kanzatrails.org/landon-nature-trail/access-points/
South Overbrook on South Shawnee Heights Rd.