This is a Philadelphia gem with over 215 miles of recreation trails, six golf courses, disc golf, and numerous athletic fields. Other active possibilities include: horseback riding lessons, bike and skate rentals, rowing on the Schuylkill River, tennis and more.
In terms of the trails, there are a variety of surfaces from paved to off-road. The 25-mile Schuylkill River Trail (paved) runs from downtown Philly to Oaks in Montgomery County. For more info on this trail check out:http://www.schuylkillrivertrail.com/
The trail attracts cyclists, joggers, walkers and rollerbladers.
Another very popular bike/run route is Forbidden Drive. You can start at the parking area on Bells Mills Road. It's a very easy gravel path that offers a number of sights along the way. For off roaders there are a number of technical trails that weave in and out of the main path.
Here are the details for some of the other active pursuits:
Disc Golf(free): Sedgley Woods Disc Golf Course (33rd and Oxford Streets)
Driving Range: 33rd Street Driving Range (215-235-9436)
Tennis: There are courts scattered throughout the park system
Sports: City Line Sports Center offers a 32 stall driving range along with 18 holes of mini-golf, baseball and softball batting cages and a full service snack bar (215-879-3536)
Horseback Riding Lesson Information:
Belmont Stables (215-877-8090); Chamounix Equestrian Center (215-877-4419); Courtesy Stables (215-482-8108); Northwest Stables (215-242-8892)