Southeast of Sedona, there are several nice mountain bike trails accessible from the Bell Rock Pathway. Heres a looping route that allows sampleing them all.
The best trailhead is the northern Bell Rock Pathway parking area, just north of the Circle K in the town of Oak Creek on SR179.
Follow the Bell Rock Pathway north past Bell Rock. Before reaching little Bell Rock, follow signs to Courthouse Butte Loop. Just before the Wilderness Area boundary sign, turn left onto the unmarked Llama Trail. This challenging 3 mile trail continually rolls and winds northeast over slickrock, sand and rocks. It can be tough to follow at times, but generally stay to the right at intersections.
The Llama Trail ends at the Little Horse Trail which runs from Bell Rock Pathway in the west to Chicken Point beneath Twin Buttes in the east. Turn left onto the Little Horse Trail ascending for 1 mile to the slickrock Chicken Point. Take a break, catch your breath and enjoy the amazing vista. Watch out for the Pink Jeeps which like to visit this point as well.
From the northwest end of Chicken Point, look for the rock cairns marking the Broken Arrow Trail. This route descends from Chicken Point 1.5 miles down to the Broken Arrow / Morgan Road parking area. After 0.5 miles, look for the signed side trail leading to Submarine Rock, a well-known large red slickrock formation. Continue on the Broken Arrow Trail down to the parking area.
At the parking area, follow Morgan Road northwest to SR179. Turn left heading south on SR179 for 2.5 miles to the northern Bell Rock Pathway trailhead parking area. Follow the Bell Rock Pathway north back over Bell Rock and to the southern trailhead parking lot.
If you've still got energy and your butts not sore, just before the southern trailhead is the Big Park Loop (3 miles) which winds and rolls east into Jacks Canyon.
Overall, Bell Rock-Llama-Submarine is the 4th most popular mountain bike trail of all 103 mountain biking rides in Arizona.