William O'Brien State Park offers public water access to Lake Alice and the St. Croix River with canoe and kayak rentals available at the park office.

The park features a day-use area with a beach and fishing pier, plus 16 miles of hiking trails, camping with 124 campsites and camper cabins, and a visitor center.

Note that Lake Alice is currently undergoing a water control structure replacement and dredging project for the public water access.