The cache is NOT at the posted coordinates! There is a nice "Welcome To Catonsville" sign, however.
The parking coordinates are for this bonus cache, but not very useful for the Tour of Catonsville.
You can learn the coordinates for this mystery cache by completing the Tour of Catonsville Adventure Lab. You will need a smartphone with data service and the Adventure Lab app installed. You can install the app by going to https://labs.geocaching.com.
You can launch the adventure by opening the Adventure Lab app and browsing to "Tour of Catonsville", or by using this direct link on your smartphone, which should open the adventure in the app.
Once you've completed the adventure, you should have 5 codes: A, B, C, D, and E. If you need to retrieve the codes, you can reopen the adventure in the app, and view the journal entries for each of the 5 locations.
Checksum: A+B+C+D+E = 28
For the final coordinates, X=B+E
The cache is located at the following coordinates:
N 39° 16.AEB W076° 44.CXD
Unfortunately, the bonus cache isn't within walking distance of the rest of the "Tour of Catonsville." You'll need to take a short drive.