The fun doesn’t stop when winter arrives. Inyo national Forest is the home of Mammoth Mountain Ski Area. Mammoth is one of the largest ski resorts in the country, with 150 named trails, and over 5 square miles of terrain. Tamarack Lodge Nordic Center and Mammoth Nordic groom over 40 kilometers of trails and skating lane. Try the ungroomed blue diamond trails to really get away from it all. For snowmobilers, the Forest Service maintains 100 miles of groomed trails leading to thousands of acres of un-groomed snowmobile play areas.