Boats powered by a motor must be registered and properly marked, and there is a 10 horsepower limit on motors used on the lake. Boats having a motor in excess of 10 horsepower may be permitted provided the motor is not used. Motorized boats must display a current registration. Boats registered in other states must display a Pennsylvania State Park launch permit in addition to their current registration. Sailing is especially popular on Lake Arthur, and races and regattas for sailboats are a regular summer feature.
Boat rentals are available at the Pleasant Valley Day Use Area on the park's south shore.
There are a limited number of transient spaces that may be available for boaters desiring to berth their boats for short-term stays. Contact the marina office in advance to make sure space is available. The park offers a full service restaurant near the Davis Hollow Marina that is open weekends during April, May, September and October and daily from Memorial Day weekend through Labor Day. There are also snack bars at both beaches which are open from Memorial Day through Labor Day. A bait and snack shop is located at the Bear Run Boat Launch Area and a motor boat fuel and vending area is located at the park's Davis Hollow Marina.