ChamberMaster Template International Alpine Guides Share: Guide Service - Mountain Climbing International Alpine Guides Visit Website 325 Old Mammoth Road Mammoth Lakes , CA 93546 (877) 686-2546 About Map About International Alpine Guides is a California based mountain guiding service with bases in Mount Shasta, Lake Tahoe and Mammoth Lakes What's Nearby? Distance: 5 10 15 20 25 50 mi.