Peace Valley Park is a beautiful 1500 acre park system of walking/running/biking trails and nature trails, with activities including fishing, light boating and bird watching. The park surrounds beautiful Lake Galena, located in New Britian PA, just a few miles west of the quaint borough of Doylestown. Many come here to walk dogs, canoe or paddle (rentals available), picnic or just to enjoy the tranquility. If you're ever in Bucks County check it out!
http://www.buckscounty.org/government/departments/ParksandRec/Parks/PeaceValley.aspx
http://www.cronancomputer.com/bcparks/pvpark/index.html