Big Cliff Boat Ramp is an unimproved access point on Big Cliff Reservoir in Marion County, offering one of the only boating options at this small, steep-sided reservoir.

Be aware that the reservoir experiences significant daily water fluctuations of up to 24 feet due to reregulation operations from the nearby Detroit Dam, which can affect launch and retrieval conditions.

This is a primitive facility with limited amenities, suitable primarily for experienced boaters familiar with challenging access conditions.