The route mapped here takes HAM to link with Spiro, but the network of trails makes loops of various distances possible. For a shorter run, take Dawns Trail downhill. For a longer run, stay on Armstrong to Mid Mountain, then take that trail over to Spiro. The trails are well-signed at intersections, to make navigation easy.

Spiro Trail switchbacks steeply down the mountain, sometimes in the forest but often on grassy ski slopes and shrubby hillsides. The views over Park City and the valley are amazing, when you can afford to look up from your feet. This is a popular downhill ride for bikers, so be prepared to share the trail. Spiro returns to the starting point of Armstrong, completing the rewarding loop. If you fancy some refreshments following your run, Silver Star Cafe is the place for a cold drink or meal on a sunny patio, and it’s right next to the trailhead.

Sources: https://www.stayparkcity.com/blog/top-park-city-hikes/ https://www.trailsisters.net/2018/06/20/where-to-run-park-city-utah/