Marcus Island Campground Boat Ramp provides a small boat launch with adjacent parking lot located before the campground entrance, offering water access to Franklin D Roosevelt Lake when water levels are adequate.

The facility includes a day-use area with a sandy beach, picnic tables, vault toilets, and parking for vehicles and boat trailers, making it suitable for both day-use visitors and those accessing the nearby 25-site reservation-only campground.

Note that water levels fluctuate frequently and may affect launch usability; weekly ($10) and annual ($60) boat launch permits are required and must be purchased online in advance.