Here's a link map for bus stops at potomac - https://www.google.com.ph/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=bus%20stop%20at%20potomac&rflfq=1&rlha=0&tbm=lcl ... more
The closest metro station is Glenmont which is 8.5 miles away.
I want to say the A2 bus but it might have changed so here the is the link below to metro to confirm.
Best of luck
For more information I can be reached at :
11900 Parklawn Drive
North Bethesda, MD 20852
301-881-17 ... more
That is if you want to use the bus.
You could ride your bike or walk, since it is close enough.
more is below
I would budget about 1/2 an hour.