Twin Lakes - really a single lake with a narrow choke in the middle - lies at 8,600 feet. Nestled between Panorama Dome and the steep southern flank of Mammoth Mountain, Twin Lakes is a popular fishing destination and the source of Mammoth Creek. There is a busy campground here with campsites on both shores, a historic lodge and restaurant, an outdoor wedding chapel, a general store offering basic supplies, and fishing tackle and boat rentals.