This was a coal line before it was a trail. The narrow-gauge railroad was finished in 1880 to move coal out of the Coalville mines, Union Pacific walked away from it in 1989, and it was dedicated as Utah's first non-motorized rail trail in 1992. Because it follows the old grade, it loses elevation steadily from about 6,900 feet near Park City to 5,280 at Echo, so the ride out is downhill and the ride back is work. It passes Silver Creek Canyon's wetland meadows, Wanship, and Coalville, then runs along the Weber River.
Do this: Biking, walking, cross-country skiing
Family note: Flat, safe family pedaling
Fees and hours: stateparks.utah.gov
Add to the trip: Redman Campground (Camping, 6 mi) · Silver Lake Boardwalk (Hike, 6 mi) · Lake Mary, Martha & Catherine (Hike, 6 mi) · Spruces Campground (Camping, 8 mi)