on top of the bluffs. Several sites on top of the bluff are accessible via a short (max. 100 yards) walk from a parking area. Small, rustic camper cabins in the campground on top of the bluff offer slightly more comfortable camping. Usually feature bunk beds and a screen-porch. They do not have running water or indoor bathrooms, though they are located within walking distance of campground bathrooms. Fishing: Northern pike, walleye, bass, and trout can be caught from the St. Croix riverbank. There is a fishing pier near the outlet of Lake Alice. Swimming: Sandy beach on Lake Alice. No swimming in river because of currents. Trails: There are of hiking/cross-country skiing trails in the park, including trails that range from easy to difficult. References Sources Arthur, Anne. Minnesota's State Parks. Adventure Publications, Inc.: Cambridge, MN, 1998. Bewer, Tim. Moon Handbooks: Minnesota. Avalon Travel Publishing: Emeryville, CA, 2004. Meyer, Roy W. Everyone's Country Estate: A History of Minnesota's State Parks. Minnesota Historical Society Press: St. Paul, 1991. Minnesota Department of Natural Resources. 2006. The Minnesota Department of Natural Resources Web Site (online). External links William O'Brien State Park 1947 establishments in Minnesota Protected areas established in 1947 Protected areas of Washington County, Minnesota State parks of Minnesota