This hike originates at a trailhead for both String and Leigh Lakes, labeled on some maps as Paintbrush Canyon Trailhead. As mapped, the entire route is 11 miles long, though it is an out-and-back so you could turn around whenever you'd like. For those who venture to the end, two side trails venture to Bearpaw and Trapper Lakes, as well as a quiet cove along the shores of Lake Jackson.

Named after a 19th-century trapper, the 1,800-acre lake reaches an impressive depth of 250 feet, with a surface elevation near 6,900 feet above sea level. For perspective, across the lake from the trail, the 12,600-foot peak of Mount Moran stands a full mile above where you'll be running. It's also the 4th highest peak in the Tetons!

The best time of year to enjoy this hike is between May and October. A large paved parking lot at the trailhead is suitable for larger vehicles, including RVs and trailers. Seasonal restrooms are also available.

Sources: https://en.wikipedia.org/wiki/LeighLake http://www.tetonhikingtrails.com/leigh-lake.htm