this blog posting "Philadelphia Bicycle News: Schuylkill River Trail Map"

has a link to a good detailed google map of the trail, side trails, train stations etc

This place is an amazing place to hike.

Founded in 1970, the Pennypack Ecological Restoration Trust is a nonprofit land trust headquartered in Huntingdon Valley, Pennsylvania. The Trust is staffed by professionals and volunteers dedicated to the stewardship of the lands that are protected by the Trust in its Pennypack Preserve natural area. The Trust offers a variety of programs and services including, but not limited to:

• Trails in the Preserve open free to the public to explore
  and enjoy the natural world all year long
• Professionally managed natural area restoration
• Urban deer herd management
• Volunteer training
• Meeting facilities for community organizations
• Professional education and internships