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In the densely populated Bay Area, the upper part of Berkeley’s campus is a mostly undeveloped preserve with scenic trails. The Golden Gate National Recreation Area – home of the North Face Endurance Challenge – Muir Woods National Monument and Point Reyes National Seashore are across the bay. Farther out for the weekend arte Lake Tahoe and Yosemite National Park, where the north end of the 211-mile John Muir Trail is located.