Loop via Rail Trail
Basin Recreation has created many fabulously exciting and scenic trails in recent years. This isn't one of them. The South Canyon loop trail comes to bat with three strikes already: the riding isn't exciting, the views don't inspire, and the trail doesn't really go anywhere. It's not a trail. But there are so many great trails nearby. So I'll struggle mightily and figure out who, exactly, would want to ride this loop.
The shorter version of the South Canyon loop is 6.7 miles. The longer ride adds an out-and-back on South Canyon at the far end of the loop before heading back, and is 9.3 miles. Total climbing for the longer ride is about 600 feet. And the climbing is a little steep for beginners, which is why I'm not suggesting this as a ride for grommets.
Then you can either head straight back, or continue around the mountain to the Browns Canyon road out-and-back, then complete the loop. Frankly, the best part of the South Canyon trail is the part everybody skips -- the piece between RocMon and Browns.
Most of the trail surface is volcanic ash, with bits of pumice here and there on the trail. Lower on the mountainside, the clay surface was pocked and rough with horse hoof prints, and a few road apples.
When the trail reaches a fence, it follows the fence west, then north. This stretch is probably the least exciting section of trail in all of the Park City area. The trail ends in a metal gate. Go left on the gravel road, and follow it back toward the parking area.
0.0 At the Promontory sign N40 43.475 W111 28.309
Go 100 feet west, fork L on the Rail Trail
N40 43.471 W111 28.338
2.6 Fork L off Rail Trail N40 41.373 W111 27.477
Go straight through the 1st gate to ST
(don't veer back north to the big metal gate)
Start RocMon Trail
3.2 Go through gate, R on South Canyon Trail
N40 41.299 W111 27.201
4.5 At Browns Canyon, turn around
N40 40.953 W111 26.034
5.8 Back at fork, keep straight
6.0 Keep straight N40 41.510 W111 27.128
7.2 Corner of fence, due west along fence
N40 42.282 W111 27.482
7.4 90-degree R, due north along fence
8.4 Through gate, go L on DT
N40 43.136 W111 27.784
DT will gradually turn from W to N
9.0 L onto paved bike trail
N40 43.449 W111 28.082
9.3 Paved trail ends, cross road to 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.