DC Specific: How can I get from Arlington (Clarendon/Courthouse) to Glover Park (north of Georgetown) with public transit?

There are no metro stations near Glover Park. I get that I can take the 38B from Clarendon to the heart of Georgetown, but I’d prefer not to walk the mile and a half the rest of the way. What line can I transfer to?

Bonus points for a short journey – I know how bus trips with a transfer can take up to an hour and half. I’m only going 3 miles.