Mountain Ranch Bike Park
The Mountain Ranch Bike Park in Eagle Mountain offers the best stunt biking in Utah County -- and possibly in all of Utah. There's a skills park, a pump track, a jump line, and several technical trails featuring man-made stunts. The skills park, pump track, and jump lines lie under the power lines on a very gentle slope. The XC and DH trails are on the juniper-covered hillside to the south. From street-side parking, it's 0.3 miles up the trail to the stunt area.
110 Loop
110, 220, under the power lines. Voltage. Get it? 110 is an easy cruiser for beginners, offers practice at bermed turns and little dirt hops for intermediates (marked).
0.0  From the west side of the skills area,
ride uphill southwest on the cinder path
0.3  Fork L on gravel DT
50 feet later, fork L on ST downhill
0.7  Back to skills area

220 Loop
220 has a spooky drop-in, then flies down to dirt jumps.
0.0  Uphill on cinder path as above
0.3  Fork L on gravel DT, keep straight past 110 entry
0.4  As DT turns R and west, find ST on your L
50 feet later, fork L, climb 100 feet north, fork L over drop
0.7  R to join Juniper (L for jump line)
0.8  Join Juniper
0.9  Drop into Skills Park

Juniper Loop
Good stuff. Stunts and drops.
0.0   Uphill on cinder path as above
0.3   Fork L on gravel DT, keep straight past 110 entry
0.4   As DT turns R and west, find ST on your L
50 feet later, fork L, climb 100 feet north
At 220/Juniper fork, keep straight
0.45 Either way (L=easier)
0.5   Keep R uphill (L=cruiser)
0.6   L downhill
0.7   Trails rejoin
0.85 220 joins on L
1.0   Drop into Skills Park

Golden Eagle Loop
Ridgeline. More of an XC flavor. Some unfinished business here. Will likely change.
0.0   Uphill on cinder path as above
0.3   Fork L on gravel DT, keep straight past 110 entry
0.4   As DT turns R and west, find ST on your L
50 feet later, fork R and climb up the hill
0.6   Fork L
(R=to DT for Flintstone trail and unfinished trail SW)
0.8   Keep straight (uphill) at 2 forks
1.0   Trail turns 180 -- foot trail forks off on R
1.2   R downhill to join Juniper
1.6   At skills park

Getting there: Take the I-15 Lehi Main Street exit and turn west. Continue west on SR-73, crossing Redwood Road (11600 West). Just after climbing the hill, turn left at the stop light onto The Ranches Parkway. Stay on that road as it narrows and begins to wind around. When you come to a T intersection at the end of The Ranches Parkway, turn right on Golden Eagle Road. Drive about 1/3 mile and watch for the trail kiosk on your left. Park by the trail kiosk and begin your ride by climbing up the trail heading south.
Trail conditions and connections will change. Use at your own risk!