Four Mile Run Trail
The Four Mile Run Trail is a 7-mile, paved bike trail in Arlington County, Virginia that runs along Four Mile Run from Falls Church to the Mount Vernon Trail near Ronald Reagan Washington National Airport, where Four Mile Run empties into the Potomac River. The trail runs roughly parallel to parts of the Washington & Old Dominion Railroad Trail as it follows Four Mile Run, sometimes on the other side of the stream.
In 2009, a trail extension was completed near Shirlington that not only linked the end of the Washington & Old Dominion Railroad Trail with the Four Mile Run Trail, but also allowed trail users to pass under the Shirley Highway (Interstate 395) and West Glebe Road without having to ride on-street in Shirlington and Alexandria.
Coordinates: 38°50′42″N 77°05′43″W / 38.8451247°N 77.0951816°W
...
Wikipedia