Urban Trail Company:
More than 100 miles of beautiful, natural-surface trails are located on varied terrain throughout the Kansas City area. This site has maps, directions, and other info.
AllTrails:
A great resource – good maps & pics, good info for trails, easily searchable. You need to set up an account but it’s free.
https://www.alltrails.com/us/missouri/kansas-city
Parkville Nature Sanctuary:
http://parkvillemo.gov/nature-sanctuary/
Overland Park Arboretum:
https://www.opkansas.org/recreation-fun/arboretum-botanical-gardens/
Park Listing for Johnson County Parks and Recreation
https://www.jcprd.com/676/Park-Listing
Trail Guides to Johnson County Parks and Streamway Trails:
https://www.jcprd.com/592/Trail-Guide
Lawrence, KS Nature Parks:
Prairie Park Nature Center and Nature Preserve: https://lawrenceks.org/lprd/ppnc/
Lawrence Nature Park: https://lawrenceks.org/lprd/parks/kansaslandtrust/
List of Parks and Trails: https://lawrenceks.org/lprd/parks/
Kanza Rails-to-Trails Conservancy:
Flint Hills Trail: https://kanzatrails.org/flint-hills-nature-trail/
Landon Trail: https://kanzatrails.org/landon-nature-trail/