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Road to Queen Elizabeth Boulevard (across from Candace Lane): Stream valley trail, one mile, gravel.
•By Metro, (202) 6377000: Bikes are permitted on Metrorail during certain hours with a permit.
•Mount Vernon Bicycle Trail (NPS), Key Bridge traffic circle in Arlington to Mount Vernon, (703) 285-2598: 18.5 miles, asphalt trail, along the bank of the Potomac River. A portion of the trail through Alexandria is on the road.
•National Park Service (NPS): (202) 6197222.
•Northern Virginia • Regional Park Authority (NVRPA): (703) 352-5900.
•South Run Trail (FCPA), from Burke Lake Dam southward, crossing Lee Chapel Road, leading to South Run RECenter: Stream valley trail, 1.6 miles, asphalt bikeway.
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