In southcentral California, the Giant Sequoia National Monument has several unplowed roads open to snowmobiling in the winter, including the Great Western Divide Highway. There are several miles of groomed trails, too.
There are two main snowmobiling trailheads: Quail Flat and Sherman Pass.
To reach the snowmobiling at the Sherman Pass trailhead from Ridgecrest, go west to US 395. Travel north on US 395 for 15 miles. Go west on Ninemile Canyon Road (Kennedy Meadow Rd.) for 27 miles. Turn left on Sherman Pass Rd. The trail begins 7 miles up the Sherman Pass Road at the snow line.
Overall, Sherman Pass is the 31st most popular snowmobile trail of all 31 snowmobiling rides in California.