The 4 Lazy F Ranch, also known as the Sun Star Ranch, is a dude ranch and summer residence in Jackson Hole, Wyoming, built by the William Frew family of Pittsburgh in 1927. The existing property was built as a family retreat, not as a cattle ranch, in a rustic style of construction using logs and board-and-batten techniques. The historic district includes seven cabins, a lodge, barn corral and smaller buildings on the west bank of the Snake River north of Moose, Wyoming. The property was added to the National Register of Historic Places in 1990.