With a surface of more than 16,000 acres, the South Mountain Park and Preserve is the largest municipal park in the nation. On its trails there are activities for everyone, from horseback riding to hiking and mountain biking. Cars enter Summit Road and are allowed to proceed to Dobbins Lookout and Gila Lookout. Dobbins Lookout is perfect for a valley vista, and Gila Lookout provides riveting views of the Gila River Valley. Be wary that the road is not only shared by bikers and hikers, but also contains steep sections and blind curves. Do not exceed 25 mph.