This trail has become known as "Nuns" as it starts at the bottom of the valley off of the grist mill trail and ends at a Nunnery. While you do not typically want to climb all the way to the nunnery (as you are probably not a Nun) there is turn off almost at the top onto Triple Log
which takes you up to the Catonsville trails.
This trail starts off of the paved Grist Mill Trail
in the park. You'll spot its entrance by looking for the large wooden foot bridge over a drainage area, and adjacent to the old stone drainage tunnel. The start of this trail is through the drainage tunnel. When you first start out you have a rock covered stream crossing followed by a short distance of singletrack. This singletrack opens up to an old stone roadbed. The way I have this drawn, this is all up, and steep. Expect your heart rate to go up! It's much more fun down.
About 3/4 of the way up, you'll see an unmarked trail to the right, which goes downhill. This trail is Triple Log
, and is the connector most people take to get over the rest of the Catonsville trails and stay off of the Nunnery's property. If you take this trail all the way up you'll end in private property and will have to turn around.
The Strava Segment below actually ends at Triple Log
, as good direction.