One of the largest urban green spaces in the country, Philadelphia’s Fairmount Park consists of more than 9200 acres of trails, woodlands and wetlands. The park is divided by the Schuylkill River into east and west sections. There are many options for runs here, so it’s not easy to plot one particular route. One good option is the Kelly Drive Path. Start near the Philadelphia Museum of Art and head north through East Fairmount Park along the river. If Kelly Drive is too busy for you, use the adjacent dirt Boxer Trail. For a loop, cross one of the bridges and run back through West Fairmount Park. Crossings are at Girard (1.2 miles), Strawberry Mansion (3 miles), or Falls Bridge (4.25 miles).