Watts Bay Marina Boat Ramp provides access to Lake Arthur at Moraine State Park with 20 numbered parking spaces featuring tie-downs near the launch area.

The facility specializes in sailboat and catamaran dry mooring with capacity for 138 boats in numbered spaces plus 36 small sailboats and sailboards in rack spaces, making it ideal for sailing enthusiasts.

ADA-accessible restroom facilities are available on-site, and the location is home to the Moraine Sailing Club, which offers racing events and sailing instruction throughout the summer.