Seminoe State Park is located by Interstate 80, Exit 221 or State Route 220. Seminoe State Park is nestled up against the base of the Seminoe Mountains. One of Wyomings treasures is located 35 miles north of Sinclair, Wyoming. Seminoe Reservoir offers the full range of water-based activities and is known for both trout and walleye fishing. Day-use and overnight facilities feature improved sites, comfort stations, tables and grills.