Leigh Canyon is a glacially carved, broad U-shaped valley in Wyoming’s Grand Teton National Park, stretching about 6 miles between Mount Moran and Thor Peak to the north and Mount Woodring to the south. It was formed as glaciers retreated near the end of the Last Glacial Maximum roughly 15,000 years ago, creating the classic profile of an ice-cut mountain canyon. The canyon opens at Leigh Lake and reaches its head at Mink Lake. Today it remains part of the striking canyon-and-peak scenery of the Teton Range within the park.