Urban Trails: San Francisco

Full-color guide to 50 trails, many of them within city limits Routes rated for fitness for walkers, runners, and hikersSan Francisco is home to more than 800,000 residents and hosts more than 17 million business and leisure travelers each year. But few visitors or locals, for that matter realize that there are more than 220 premier parks and 70 miles of hiking trails in the city itself. Urban T...