Nockamixon State Park has multiple boat ramps providing access to 1,450-acre Lake Nockamixon, with the Haycock Boat Launch featuring a three-lane concrete ramp and ample paved parking in the northwest corner, while Three Mile Run offers a two-lane concrete ramp with dock and limited parking in the southeast corner.

Launching facilities are open 24 hours daily, and the park's 20 hp motor limit keeps wakes minimal, making it suitable for various watercraft including sailboats, kayaks, and motorboats.

Additional amenities include a full-service marina with 648 boat slips, dry storage, boat rentals, and a fishing pier.