The red dirt and rocks along these mountain tops provide an interesting accent to the high-speed riding, as it's very different than the dark black dirt in Park City proper.

Overall this trail is flowy, but the flow doesn't last—an extremely technical, rocky descent along the ridge known as "The Spine" is absolutely brutal, but can be walked by intermediate riders. Again the singletrack switches back to flow.

The route shown here finishes by dropping down past Desolation Lake to the Mill D North Fork Trail. Mill D finishes at Mounthaven in Big Cottonwood Canyon. Since you can drive up the pavement from Mounthaven to the top of Guardsman Pass, this option makes for a popular quick shuttle run for riders coming from the Salt Lake City side of the mountain. Instead of descending all the way back to the city, riders rip a quick, fast descent down Mill D instead. This makes the ride distance and difficulty more manageable for some riders.

Wherever you park and whatever shuttle you do, make sure that you descend down the correct side of the mountain so you don’t get stranded.

Sources: https://www.singletracks.com/blog/mtb-trails/5-epic-shuttle-rides-near-salt-lake-city/ https://www.skiutah.com/blog/authors/tim/the-wasatch-crest-trail-it-s-got-a-shuttle