This glacially formed lake is situated in the Grand Teton National Park in western Wyoming, USA. It is 4.5 km (2.8 mi) at its maximum length and is and 3.9 km (2.4 mi) wide. It lies at ends of both Paintbrush and Leigh Canyons.
The lake can be accessed by water, through String Lake, or by land – the Leigh Lake Trail follows the eastern shore of String Lake and is a level hike of around 1.6 km (1 mi) over easy terrain. Once there, the lake has sandy beaches, fishing and plenty of bird watching. There are two islands canoeists can explore.
It is located close to Mount Moran, just to its south east, and is a popular start point for climbers – as the mountain is difficult to access by land, many approach the mountain by canoe.
The Leigh Lake Ranger Patrol Cabin on the north east shore of the lake is an entry on the National Register of Historic Places, being one of the first built in the 1920s and now the one remaining example of its type. Designed and built by the US Forest Service, the cabin is still in use by the National Park Service.