Highline Trail is a hiking trail in Sublette County, Wyoming. It is within Bridger-Teton National Forest and Bridger Wilderness Area. It is 13.5 miles long and begins at 9,084 feet altitude. Traveling the entire trail is 27.0 miles with a total elevation gain of 3,659 feet. The Poston Meadows (elevation 9,131 feet) wetland and the Boulter Reservoir (elevation 9,232 feet) reservoir can be seen along the trail. There are also waters along the trail.