495 new exit 47A (Route 7) old exit 10W, (Route 7) Tyson's Corner; go about 13 miles to Sterling Park; see a sign for Algonkian Parkway, before NOVA college, turn Right at light go all the way through Sugarland to river & park entrance a total of 2.2 miles from (7) follow road to boat ramp; fields by ramp.