Thin Air
Sidney Peak Trail along the top of the plateau, then Mace's Run out and back through the aspens at over 10,000 ft.
Your timesno timed runs yet
Ride mode times every run on its own: the clock starts when you roll out of the start and stops at the finish, with splits at each marked spot. Leave Ride mode on between laps and it re-arms when you're back at the start. Times stay on this phone.
Right now at the trailhead
Get the GPS file
Scan with a friend's phone, or tap below. Then open it in your ride app.
- iPhone: tap Download, open it from the Downloads bar, then Share → Trailforks, Strava or Garmin.
- Android: tap Download, then open the file and pick your app.
- Garmin: or drag it into Garmin Connect → Courses → Import on a computer.
https://bsqrd-designs.com/dirt/thin-air/
Getting there
Park at Sidney Peak trailhead (Brian Head Peak Road)
SR-143 at the Brian Head Peak Road turnoff, Brian Head, UT 84719
- Small Forest Service pullout at the road junction; no water. If it is full, park in town and add the climb on SR-143.
- Start and finish are the same spot. Follow the cue sheet and the arrows on the map.
Cue sheet
| 0.0 | Sidney Peak Trailsingletrack | 1.1 mi |
| 1.1 | Dark Hollowsingletrack | 0.2 mi |
| 1.2 | Mace's Run Trailsingletrack via Mace's Run · Mace's Run end | 3.3 mi |
| 4.5 | Dark Hollowsingletrack via Dark Hollow junction | 0.2 mi |
| 4.7 | Sidney Peak Trailsingletrack | 1.1 mi |
| 5.8 | Back at Sidney Peak trailhead (Brian Head Peak Road) |
Know before you go
- Everything here is above 10,000 ft. Go slower than you think, drink a lot, and get off the ridge if thunderstorms build in the afternoon.
- Mace's Run ends at the Brian Head Resort bike park. Turn around there: the park's downhill trails need a lift ticket and are ridden downhill only.
- Dark Hollow drops a long way toward Parowan from the junction. It is a shuttle ride, not part of this loop.
- Snow can sit on these trails into early summer. Check with the Cedar City Ranger District before a June trip.
Ride smart
- Water: plan on about 1 L for this ride. There's none on the trail.
- Signal is spotty. Tell someone your route and your time back.
- Emergency: call 911 and say "Thin Air ride, parked at Sidney Peak trailhead (Brian Head Peak Road), Brian Head Trails", plus the coordinates from Locate me.
- Wildlife: give horses, burros and anything with horns room, and never feed them.
- Stay on trail. Desert crust and mountain soil take decades to heal.
Report a problem or share a photo
Washout, closure, new fence or a missing sign? Got a great shot of a junction? Send it. It goes straight to Ryan; photos he approves show up on this page with your credit.
Trail photos
End ride?
Turn calls, the timer and your recording stop when the ride ends.