Rock River Falls is a 1.8 mile out and back trail located near Deerton, Michigan that features a waterfall and is rated as moderate. The trail is primarily used for hiking and is accessible from May until October.
long walk but worth it
If you are going to the falls you will need an older truck or jeep. After Rock River Rd the roads (more like trails) are narrow two tracks. We had a full size truck and had to turn around. We never actually got to the falls but I don't want anyone to head back there not knowing what to expect. The forest is pristine otherwise and was a nice albeit bumpy drive.