Big Marine Park Reserve Boat Ramp offers a motorized boat launch with 33 trailer spaces on Big Marine Lake, open daily from 6 a. m. to 11 p. m. with winter access available.

The facility is located at the Washington County Park on the west side of the lake and includes additional amenities such as a 100-foot handicap-accessible fishing pier, swimming beach, and picnic areas; a vehicle permit ($7 daily or $30 annual) is required to enter the park.