Still can't place it. But I do ride Woodville road out of Unionville a few times a year, so I might have wondered through some time or another.
That run from Boyds to here in PA can be a real chore from about 2pm till after dinner time on a Friday. So I had a string of back roads all just a little west of 27 that I could use to turn it into a nice ride. Clarksburg roads, skirt west of Mt Airy, then up to Unionville and New Windsor. Then skirt west of Westminster and grab 496 above the airpark. It was kind of the long way around, but once I got past 355, I was done with sitting in traffic.