East of Salt Lake in Mueller Park, the 13 mile out & back Mill Creek Trail is a packed single track in the Wasatch Range. To reach mountain biking at the trailhead, follow US15 east to Exit 318. Head east on 2600 South (aka Orchard Road). At the intersection with 1800 South, turn right and follow the signs to Mueller Park Picnic Area.
Overall, Mill Creek Trail is the 47th most popular mountain bike trail of all 73 mountain biking rides in Utah.