Gunston Road in Mason Neck works. From Gunston Elementary School to the end is roughly five miles with no lights or stop signs. Slightly downhill (and usually downwind) on the way out. You can do an out-and-back into the state park to add a couple of low-traffic miles. You can get some good hill intervals on the big hill in Pohick Bay Regional Park while you’re there.
Sent from my iPhone using Tapatalk