Northeast of Mammoth Lakes, the Orange Diamond Trail System are 200 miles of groomed snowmobile trails across elevations from 7,000 to 10,400 feet. The trails are blazed with orange markers, and many of the routes are groomed. There is a variety of trerrain from forested snow-covered roads to open play areas. A good place to start snowmobilng is the Crestview Rest Area on US395 north of Mammoth Lakes.
Note: on the trail map, the solid line indicates signed trails. The dotted line indicates unsigned trails.
Overall, Mammoth Lakes is the 3rd most popular snowmobile trail of all 31 snowmobiling rides in California.