The groomed Lakes Basin Winter Public Access Corridor is the main artery for non-motorized travel into the Mammoth Lakes Basin in winter. The corridor begins at the winter closure parking area at the end of Lake Mary Road and runs along the left side of the fee-based nordic track all the way to Horseshoe Lake. Stay off the groomed nordic track if you haven't purchased a ski pass. The first mile or so—to the edge of Lake Mary, with its picnic spots and grand views of Crystal Crag and the Mammoth Crest—is uphill and popular with a variety of users. From Lake Mary to Horseshoe the trail is flat or gently rolling.