https://peoria.org/blog/post/hiking-project1/ This is a good listing of the many trails in the area.
Mark Monge has more info on Peoria, IL outdoor recreation opportunities than anyone! His website is very impressive. https://peoriaoutdooradventure.com/trails
https://www.localopal.org/peoria-county.html
Earthtrekkers are one of my favorite sources for great hikes in Europe and around the world https://www.earthtrekkers.com/
The Peoria Hiker 