With almost no elevation gained or lost, the challenge of this trail lies mostly in balancing the desire for speed versus the desire to not run off the trail into the underbrush.
Start the trail by riding across a narrow metal bridge and up to a raised dirt road, find the trail dropping off the other side of this road towards the river. The trail starts off hugging the embankment of the road but soon drops right into the trees. Smooth singletrack with the occasional sand trap make for a fun fast ride.
You'll mostly just follow the tire tracks, there are tons of side trails that lead to the Rio Grande and few that lead back up to the raised dirt road. You'll never get too far though so you can always backtrack to the main trail, the Bosque (forest) is only a few hundred feet wide at its widest points. This section ends at a large open area with a couple of blue metal gates.