Princess Di Trail - From Promontory on paved Three Mile Canyon Trail, with return via Rail Trail
The Princess Di trail is a singletrack trail that hugs the hillside east of Promontory. The track is narrow, with some areas of loose volcanic rock that create tricky traction on the many tight switchback turns. This makes the trail "expert" in technical requirement, although intermediates can ride it with a few dismounts. Princess Di itself is 7.5 miles in length, with the total loop ride being 14.5 miles. The 7 miles you'll spend on the paved Three Mile Canyon and cindered Rail Trail are pretty easy. Still, the ride is a moderately strenuous trip due to the climbing on Princess Di.
Princess Di Trail, counterclockwise loop:
0.0   Back to road N40 43.475 W111 28.309
Cross road, L on paved trail
Begin Three Mile Canyon paved trail
0.3   Keep straight on paved trail at all crossings
N40 43.449 W111 28.082
(R = to South Canyon Trail)
2.4   Top of ridge, begin to descend
3.0   L on singletrack (end of pavement 2010)
N40 44.537 W111 26.103
Begin Princess Di singletrack
7.2   Top of ridge, angle L across road to ST
N40 46.140 W111 26.772

7.6   Cross paved road
9.4   Drop R on ST as you hit clearing with bldg
N40 46.684 W111 27.391
10.5 Plunge down to road, turn R and go over I-80
N40 46.512 W111 28.066
Immediately after freeway, drop R into "hole"
N40 46.530 W111 28.161
R into drain tunnel, go under southbound land
R on Rail Trail in between lanes of freeway
14.5 L into parking area

Getting there: Take I-80 eastbound out of Salt Lake City and cross Parley's Summit. Pass the Park City exit, then a couple of miles later, take US-40 south at Silver Creek Junction. In 1 miles, exit at Silver Summit. Turn L (east). Follow the road as it veers north. At 0.8 miles after leaving US-40, turn right on Promontory Ranch Road. Continue about 1/2 mile. Just after crossing the Rail Trail, turn left into a paved parking area with a "Promontory" sign. Begin the ride by heading for the paved trail across the road from parking.

Bathroom: Outhouse at trailhead.
Water: None at trailhead. Convenience store 1/2 mile away.
Camping: None in immediate area. Nearby at Rockport, Echo, or Jordanelle Reservoirs.
Bike Services: Multiple shops with rentals and repairs in Park City.

Copyright 2010 Mad Scientist Software Inc
Trail conditions change, and the layout of a trail may change without notice. Use this trail guide at your own risk.