Marsh Trail is a hiking trail in Santa Cruz County, California. It is within Big Basin Redwoods State Park and Theodore J. Hoover Natural Preserve. It is 0.4 miles long and begins at 35 feet altitude. Traveling the entire trail is 0.9 miles with a total elevation gain of 56 feet. Near the trailhead there are drinking water and restrooms. The Horse Trail Camp site can be seen along the trail.