May be closed during summer months due to fire danger, check with the ranger station for details.
The Gamble Oak Trail is mostly smooth and fast though it has one very difficult climb/hike-a-bike and a couple of other short rocky climbs as well.
This trail runs from Pokerchip to Mahogany and has lots of intersections, many of which are not marked. There also a number of signs that might lead one to believe they are actually on the Mahogany Trail. If you're headed north to south stay mostly left.