Many locals still call the Tempi'po'op Trail the Anasazi Trail. From the western (Anasazi Valley) trailhead, it's an easy climb to the cliff edge where you can explore Native American rock carvings. This is a beginner-level ride, but advanced riders will enjoy it just for the destination.
The eastern side of Tempi'po'op is more hard-core. The less-known Tukupetsi trailhead on the east side of the Preserve takes you directly to the fun stuff. There's a mile of very fun semi-technical riding. The pitch is more steep, and there's a bit of "bumpiness" as the trail follows the break of the cliffs above the Santa Clara River gorge.

The western (Anasazi Valley) trailhead is at 3000 feet elevation. The trail to the rock writing area is 1.3 miles, rising 300 vertical feet. This is a reasonable pitch for most beginning riders. This first section of the Tempi'po'op trail is improved with packed road-base, so it's an easy ride for beginners and kids.
To the north are red cliffs and eroded skirted mesas, with the Pine Valley Mountains visible as we ride higher. Views to the south include colorful eroded badlands, mesas, and the Santa Clara River gorge. This ride is big on visuals.

The trail hits a spur to the prehistoric farmstead at mile 0.8. This is a great ride for kids and beginners. Ride up to the farmstead loop and take an education break. What you're seeing are walls of grain storage bins built into the ground.
From the farmstead, continue up the trail. At the top of the improved trail (at least, as of 4/09), walk south from the end of the trail and find the rough hiking trail that descends slightly below the cliff edge.

There are dozens of petroglyph panels here. Most of them are within the first 100 yards. Additional rock art is scattered along the cliff edge. Only the very persistent will find all of them.
Most riders will now head back downhill, making the ride a 2.6-mile out-and-back. Adventuresome bikers can continue eastbound (and a bit uphill) to reach the technical rock of the eastern Tempo'po'op trail.

Tempi'po'op with Graveyard-area trails and the gorge road
The Tukupetsi Trailhead (sometimes incorrectly called the Graveyard Wash trailhead) is at 2800 feet elevation, just on the outskirts of Santa Clara. There's a complex of easy trails here (once you make the short climb onto the mesa) for beginning riders. For the hardcore, the Tempi'po'op trail climbs to 3350 elevation along the Santa Clara River gorge.

Tukupetsi to Tempi'po'op
As you recall, Tempi'po'op (Rock Writing) is the east-to-west route from the Tukupetsi to the Anasazi trailheads. It's an over-the-hump and back-down ride each direction. If I were guiding another rider on this trail I'd start at the Tukupetsi (eastern) trailhead, because that puts the techy climbing early in the ride. Climb up and over to the petroglyphs, hit the easy eastern trail (and maybe visit the bathroom) then turn around and do the up-and-over back to the eastern trailhead.

Out and back, Rock Writing is a solid 8 mile ride. The rockfest singletrack in the middle of the Tempi'po'op Trail will be enjoyed by solid intermediate to advanced riders. Less-experienced riders will find the pitch a bit steep, and will need to step over quite a few techy spots. The one-mile rocky section is also the steepest part of the ride, rising 500 vertical feet in less than one mile.

At the step-over gate of the Tukupetsi trailhead, take the left fork. (The right is Fishhook, taking you to the less exciting singletrack of Graveyard.) Keep westbound for 0.3 miles. At a five-way trail intersection, Rock Writing continues straight.
A more interesting ride is to turn 90 degrees left, southbound, on Een'oog (Old Ones). This singletrack turns parallel to Rock Writing, but right along the cliff. It will rejoin Rock Writing in 0.3 miles. (At mile 0.1 of Een'oog, note the trail coming in from the left. The U'waiv trail comes up from the Enepitsi trail along the river. On the way back, you'll keep left and uphill to avoid descending to the river.)

Just after Tempi'po'op and Een'oog rejoin -- mile 0.6 if you stayed on Rock Writing, 0.7 if you took the meander on Old Ones --the trail begins to climb the escarpment. At first it's a broad trail along the cliff edge, then meandering singletrack.

At mile 1.3 the slope eases and the trail again follows the edge of the cliffline. At mile 1.7 there's an old fence, and the trail again becomes broad old doubletrack as it descends towards the petroglyphs.
At mile 2.4, keep straight as the Tava'atsi forks to the right downhill. Now keep northwest to reach the petroglyph area 0.1 miles later. The glyphs are found along the rim, and on boulders below the rim, for the next 1/10th mile.

The trail will now turn away from the cliffs and descend through a couple of turns. The connector to the farmstead is at a trail fork at mile 3.2.
At mile 4.0 from the eastern trailhead, you'll reach the Anasazi Valley trailhead. There's a toilet here.

The trails north of Rock Writing are easy to ride, but relatively uninspiring. There's a combination of singletrack and doubletrack, including Fishbone, Upper Graveyard, Lower Graveyard, and Cholla. The Upper Graveyard and Fishhook singletracks, and the eastern end of the main east-to-west route, are easier technical. I don't have a specific ride to recommend here. Just explore.
Fishhook Trail
Fishhook is a short smooth singletrack that branches off the middle of Upper Graveyard and meanders downhill to a step-over just across the road from a parking corral.

Graveyard Trails
Upper Graveyard is a short bit of singletrack. It has its own primitive trailhead on the south wide of Graveyard Wash. Lower Graveyard is old jeep road. After a mile, it ends by joining the middle of the DT (jeep road) Cholla Trail. Cholla branches off the main DT and heads northwest to end at the border of the Preserve. There's a step-over gate and a continuing dirt road, but also a "private property no trespassing" sign facing you. So I'm not sure if this will become a real trailhead in the future.

Cholla
Singletrack connecting Rock Writing to Lower Graveyard.
Tava'atsi doubletrack
The Tava'atsi doubletrack descends north from the petroglyph area (away from the cliffs). It has some slickrock but not much scenery. It meanders down to a fence at the Preserve border. There's a step-over gate there, but (Jan 2008) no vehicle access, as a subdivision is being bulldozed into existence. Not a high-voltage option; more of a future access point.

The Enepitsi trail is scenic and popular with hikers! And the old gorge road is very easy to ride. At mile 0.4 from the eastern Rock Writing trailhead on Een'oog, the U'waiv trail descends to Enepitsi. The trail then goes west along the Santa Clara river in the gorge. Kids may need to walk a few spots during the first 1/2 mile from the trailhead -- just to get to the broad flat Enepitsi trail -- but after that it's smooth flat cranking.
The trail briefly touches some private property, and may or may not be fenced off at around mile 2. You be able to pedal all the way around to the Anasazi trailhead. If you need more exploring, there's a fork around mile 1.5 that crosses to the south side of the river to additional doubletrack.