If you are looking for a fun and challenging mountain bike ride that's not too long, these two trails are close by and a lot of fun. Located in the George Washington National Forest, they will have you grinning the whole time (well, most of it, lol!). For a longer ride, add the two together.
The Little Schloss Loop is 7 miles long. You start on a gravel road, then turn off onto a steep fireroad for a bit over a mile. The top traverse is quite technical and will likely require some walking. But once the trail opens up for the final descent, it is a blast! Details on MTB Project: Little Schloss Loop
The Cedar Creek trail is just under 6 miles, so about 11 as an out-and-back. Basically, you end up riding along a rocky creek bed. Not much elevation gain, but you still might find yourself winded from working your way through the rocks. Details on MTB Project: Cedar Creek Trail.