This trail starts about a mile from the trailhead, off to the right from the dirt road.
The first part of the trail is a doubletrack climb to the edge of Spring Creek Canyon. As you approach the canyon, turn right and parallel it for about 1-1/2 mile. If you find mud or puddles on this upper part of the ride, choose a different trail as the lower canyon will be very muddy. Ride over a narrow cattleguard through a fence. A 160 degree turn left off of this doubletrack takes you steeply down into the canyon with a loose doubletrack and a number of jumpable berms.
After you reach the canyon bottom, turn right and cross the gate to the Lower Spring Canyon. Here is where the fun singletrack descent starts. There are a few rocky sections and a couple of short steep climbs. Watch out for cactus.
Unfortunately, there is a steep, loose section at the north end that usually requires you to hike your bike up. Once you get back to the canyon rim it is a short jaunt back to the trailhead.