There is a huge maze of singletrack, doubletrack, motorized and bike trails here. Not all intersections are marked, and those that are, are a bit confusing as each trail may be marked with a number or a name and there's no real correspondance between the two. I could waste a ton of time trying to give you an exact route, but no matter how detailed the description, it would still be confusing and not altogether helpful. Compounding the difficulty is the occasional trail reroutes and closures. If you're not riding with someone who knows the area, get a map at the ranger station in Tijeras and stop at every trail intersection to verify your location. The trails generally run NW to Pine Flat or N to points along Juan Thomas Road, and can eventually be connnected to the Cedro Peak area for some epic rides. Heading N from the campground, you'll do more descending than climbing, so save some energy for the return.