More than 800 campsites are available in the Mammoth Lakes area, many of them located in the alpine lake and forested streamside settings. For opening and closing dates, fees, limits on stays and reservation information call the Mammoth Ranger Station at 760-924-5500. Campgrounds are on a first-come, first-serve basis except for Mammoth Lakes Twin Lakes, Coldwater Creek, Sherwin Creek and Old and New Shady Rest campgrounds you can reserve by calling 877-444-6777.