Mission Trails Regional Park (MTRP) is one of the best places to go hiking in the City of San Diego. Containing over 5,800 acres of open space, it is the largest city park in the State of California; and the seventh largest city park in the United States. Among many things, it contains the historic Old Mission Dam; beginner and intermediate rock climbing routes; and Cowles Mountain. Mission Trails, however, is more than just the Dam and Cowles Mountain - it is an area with over forty miles of hiking trails. While most of the park's visitors concentrate on the Eastern portions of the park - Cowles Mountain, the Old Mission Dam, the Grasslands Loop, and Kwaaypay Peak, there is also plenty of great hiking on the western side of the park without the crowds. A great intermediate hike is the Clairemont Mesa to Shepherd Pond route, which provides excellent views of the interior of the park, and slightly different terrain than a standard San Diego hike.