Boysen State Park offers 3 entrances: U.S. Highway 20 (east side), U.S. Highway 26 (south side) and Bass Lake Road (west side).
Great place to take to the water. Can be windy at times, but thats the nature of the beast.
We usually stop here for a break on our way to Thermopolis. Its always a nice visit. Decent fishing, did some swimming in this area, but it gets deep quick. There is a beech but never been there.