Welcome to Mammoth Lakes California. A beautiful place to visit but an even better place to live. Mammoth is a place for all seasons. Although we are known for our world-reknowned ski resort, Mammoth Mountain Ski Area, many people are still unaware of this gem in the middle of the Inyo National Forest in the Eastern Sierra Nevada mountains. Summers are just as enjoyable with activities including camping, fishing, hiking, mountain biking and wildlife observation.