Depending on traffic, Sometimes I take marriottsville road home. The road fun level depends on traffic, but there are 2 points where most of the time people will turn and you're good to go.
Baltimore
Marriottsville rd @ rt 70, to Marriottsville rd @ Liberty Road.
8mi
Mostly 1 lane each way, goes through some woods, some rock quarry area. Speed limit is usually 30-40 but I have been known to go slightly faster
Keep in mind that towards the end (2/3 or 3/4 through) there is a hill, a dip and a hill. There is a Laurel cop who lives in the dip and parks his cruiser there. He left the Ka band radar turned on the other day (first time in ~4yrs). A buddy also got hit by a cop about 2 months ago along the road. But there are some points when you can just open up and its AWSESOME
Link to map if available:
Marriottsville Rd to Marriottsville Rd - Google Maps