Seminoe State Park is a public recreation area located on the northwest side of the Seminoe Reservoir, at the base of the Seminoe Mountains, 35 miles north of Sinclair, Carbon County, Wyoming. The state park encompasses 1,639 acres of land and offers access to 19,000 acres of water. It is managed by the Wyoming Division of State Parks and His…Seminoe State Park is a public recreation area located on the northwest side of the Seminoe Reservoir, at the base of the Seminoe Mountains, 35 miles north of Sinclair, Carbon County, Wyoming. The state park encompasses 1,639 acres of land and offers access to 19,000 acres of water. It is managed by the Wyoming Division of State Parks and Historic Sites.