Boulder Basin/Lowline Trail is a hiking trail in Sublette County, Wyoming. It is within Bridger Wilderness Area and Bridger-Teton National Forest. It is 8.9 miles long and begins at 8,538 feet altitude. Traveling the entire trail is 17.9 miles with a total elevation gain of 5,398 feet. The New Fork Lookout Point (elevation 9,600 feet) cliff can be seen along the trail.