The Four Mile Run Trail traverses the Four Mile Run stream valley and has many twists and turns, not to mention steep sections (mercifully short). In places, the trail more or less parallels the W&OD Trail
, connecting to it in several places.
Four Mile Run takes off from Bluemont Junction Park and heads to the Mount Vernon Trail
where the latter meets the southern edge of Ronald Reagan National Airport and the Potomac River. The trail is wooded and crosses creek in numerous places. It's popular with runners, cyclists, dog-walkers and families. You'll also find a dog park off the trail in Shirlington. Phoenix Bikes, non-profit community bike shop, operates out of the Barcroft Sports Complex along Four Mile Run near George Mason Drive.