Drive west from Pinedale, WY a few miles on US-191 to the junction with Wyo-352. Turn north and follow the road about 40-miles. It turns into the improved USFS graveled Green River Lakes Road about half way, and terminates at the Green River Lakes campground. There is plenty of parking and a trailhead to the upper Green River in the Bridger-Teton National Forest.
Square Top Mountain and other peaks of the Wind River Range are reflected in Green River Lake.