Near where we live, is the George Washington Parkway, which has the Mt Vernon Bike Trail that follows it. Finally got to ride a 10 mile stretch of it today. Lots of wooden bridges and "STEEP" hills, as you can see from the signs. Belair National Park would collapse under the weight of signs if it put these in comparable positions. Have a look at http://bikewashington.org/trails/vernon/vernon.htm
