Cascade Falls (Matthiessen State Park) is a smaller plunge waterfall in Illinois, with a drop of about 45 ft.

It lies in LaSalle County, Illinois. The site is on public land managed by Illinois Department of Natural Resources.

This is a short hike waterfall: reached by a short trail, generally under about a mile each way. The walk to the main viewpoint runs about 2.2 miles round trip. The nearest town is Oglesby.

When to go: Spring. Like most waterfalls, Cascade Falls (Matthiessen State Park) runs highest after snowmelt or heavy rain and can thin out in late summer, so it's worth checking recent streamflow and the land manager's conditions page before a long drive.