Mammoth Furnace Boat Ramp is a seasonal access point on Lake Barkley in Lyon County, Kentucky, featuring a single unpaved launch lane suitable for light trailerable recreational boats.

The ramp operates 24 hours during its seasonal availability and offers unpaved parking with a capacity of 25 or fewer vehicles, with no launch fee required.

Note that this is a basic facility with no amenities such as restrooms, courtesy dock, or handicap accessibility.