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+ 51

Armstrong-Spiro Loop

Trail Running Route

Moderate
5.97 mi
1,058 ft
Sustained climb through leafy forest, then a fast descent with wide-open views over Park City.

This is one of the finest running loops on Park City Mountain. Armstrong Trail is a gradual climb on smooth singletrack, through shady forest of aspen and conifer, with occasional sunny patches of oak. It’s pleasantly cool in the summer, crisp and brilliantly colored in the fall. This trail is open to mountain bikes, but for uphill riding only (foot traffic can go up or down). 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: Written by Jesse Weber
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Strava Routes

Route and Elevation

Segments

NameDistanceElev. Diff.Avg. Grade
Armstrong-Ham-Spiro CCW5.77 mi961 ft0.0%
Armstrong TH to Ham junction3.08 mi961 ft5.7%
Snows Ln Climb0.52 mi177 ft6.3%
Armstrong | Silver Star to Dawn Cutoff1.53 mi436 ft5.4%
Armstrong | Silver Star to Ham CutOff2.94 mi863 ft5.5%
Armstrong | Silver Star to King Kong1.05 mi292 ft5.3%
Armstrong - Ham - Spiro 5.62 mi866 ft0.0%
Unnamed Rd Climb0.38 mi151 ft7.5%
Armstrong | King Kong to Ham CutOff1.79 mi554 ft5.8%
Armstrong - Dawn's to HAM1.55 mi459 ft5.6%
Ham to Bottom of Spiro - Downhill2.65 mi-863 ft-6.1%
Ham to Thaynes0.48 mi-151 ft-5.9%
HAM down0.83 mi-213 ft-3.8%
Spiro-Ham junction down2.00 mi-741 ft-6.9%
Spiro Downhill1.01 mi-476 ft-8.9%