This is what I consider my local patch. Its perfect for a weekday evening ride after work in the summer, when the mud has dried out and there are only a few random dog walkers to worry about. There is a set of bridleways to ride, plus some cheeky singletrack, and even some dirt jumps in an old disused quarry.
Park in the main car park in Wotton under edge and ride up the hill on the old London road. Or at North Nibley and ride up the steep bridleway to the quarry.
The paths on top of the hill are fine for beginners and hardtails and some of the singletrack is fun but there is nothing extreme or technically demanding.
If anyone wants to give this a go, send me a PM and I can meet you up there to show you around.