Marsh Trail is a hiking, biking, and horse trail in Sonoma County, California. It is within Annadel State Park. It is 4.1 miles long and begins at 1,197 feet altitude. Traveling the entire trail is 8.3 miles with a total elevation gain of 1,715 feet. The Hunter Spring can be seen along the trail. There is also a watering place along the trail.
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