Workshop map files are stored in a very different directory than the rest of TF2's resources. If you're here you've been trying to test the map through the Create Server button, and haven't been able to find the map.

Create Server's map selection dialog and the console's partial name matching algorithms only work for maps in the correct directories inside your TF2 folders, so you'll have to do a little more work than that.

An obvious first step, but not one to be missed.
Navigate to the TF2 section of the workshop. On the right below your queue is a control panel that shows your avatar and has a pulldown menu. Pull the menu down and click Subscribed items.

From there it'll show you a list of every map you're subscribed to. If your map is on the list congrats, you're subscribed.



Don't navigate away from this page just yet, it'll be helpful in a later step.

Getting the map to load through the console requires an identifying number.
It will follow the pattern

You can find that number in one of two ways. Either you can find the map in the workshop and copy the end of the URL, or you can locate the file on your computer.

If you did step one and still have the page open simply click the link for the map you're interested in testing. If you're in a browser you can simply go to the address bar, it'll look like this at the end:
The end bit is all you want.
Write whatever your number is down or copy and paste it, and then move on to the final step.

All of the map files you download from the workshop are stored in their own folder on your harddrive. Locate your Steam installation folder, then navigate toInside that will be a number of folders equal to the number of things you're subscribed to.
Find out which of the folders contains the map you want, in my example that folder is Write whatever your number is down or copy and paste it, and then move on to the final step.

If you pay attention to the console spew when you start up the game you can pick out the number.


Determine which is the map you want to get the number from, mine is vault1990, so that's this line
The only part we care about is right after UGC:Write whatever your number is down or copy and paste it, and then move on to the final step.

Now that you have your identifying number, boot up tf2. Open console (usually by pressing the ~ key)

Drop the number after the slash:
My example is 614857587, so mine would look like:

Press enter, and it should load.