Four Mile Run Trail

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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.

Hillier than the Washington and Old Dominion Trail, it makes a great backbone for exploring Arlington's pocket park singletrack, check out the Arlington Singletrack Tour for ideas!