Lenon Mill Park is nestled along the scenic Middle Raccoon River and is the original site of the old Lenon Mill, built in 1863. The mill no longer stands but visitors can view the one grindstone that remains to mark the historic spot or sit by the river and watch the river flow over the old dam.

Lenon Mill Park is the 1st point of access on the Middle Raccoon River Water Trail - Route A. The park also offers camping, picnicking, and excellent fishing. Species of fish commonly caught at Lenon Mill Park include Smallmouth Bass, Largemouth Bass, Crappie, Bluegill, Walleye, Channel Catfish and an occasional Northern Pike.

Lenon Mill Park features primitive camping, RV-camping with electric hook-up, water, bathrooms, a shelter house, swing set, horseshoe pit, picnic tables, a canoe access, and excellent fishing.