Welcome to the Lander Trail-New Fork River Crossing Historical Park. The park is open during the summer season, June 1st until the snow flies in the late fall. The Park is owned and managed by the Sublette County Historical Society in Pinedale, Wyoming. Step back in time into the 1860s and imagine hundreds of emigrants in covered wagons, and thousands of head of livestock, passing through here each day on their way to destinations west, primarily California and Oregon.