My wife and I are novice mountain bikers. Last year we took the Tipsaw Trail, and were quite surprised by it. We had read that the trail was beginner to moderate, and went away feeling as though we had been through hell and back. Not because the trail was poor, but because the trail was amazing, and we were not prepared.
Beware of poorly-marked rocks, however. Also, be prepared for rigorous climbs and sharp V-shaped trenches throughout.
Great experience! We're going back this year to show it who's boss.
Unfortunately, we did not snap any pictures. Hopefully we will this year, though!