FOW is thrilled to announce that the All Trails Challenge (ATC) is back for its 10th season! The challenge, if you choose to accept it, is to explore all 50+ miles of trails in the Wissahickon Valley Park over the course of 10 weeks. Whether you hike, bike, horseback ride, or run, this is your chance to go beyond your usual routes and see all that the Wissahickon has to offer. Challengers receive guided hikes to help you hit every corner of the park and give back to the Wissahickon along the way!