Rock and Dome
Climb the Mammoth Rock Trail along the Sherwin Range to upper Old Mammoth Road, lap the Panorama Dome and Panorama bike loop, then ride the whole Mammoth Rock Trail back down.
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/rock-and-dome/
Getting there
Park at Mammoth Rock Trailhead (Sherwin Creek Rd)
Sherwin Creek Rd staging area, past Sierra Meadows Ranch, Mammoth Lakes, CA 93546
- Dirt staging area at the east end of the Mammoth Rock Trail, listed by the Town of Mammoth Lakes trail system. No fee listed.
- Start and finish are the same spot. Follow the cue sheet and the arrows on the map.
Cue sheet
| 0.0 | Mammoth Rock Trailsingletrack via Mammoth Rock · Old Mammoth Road trailhead | 2.7 mi |
| 2.7 | Old Mammoth Roadpavement | 0.2 mi |
| 2.9 | Singletrack connectorsingletrack | 0.3 mi |
| 3.2 | Panorama Dome Trailsingletrack via Panorama Dome | 0.3 mi |
| 3.5 | Panorama Mountain Bike Loopsingletrack | 0.6 mi |
| 4.1 | Singletrack connectorsingletrack | 0.4 mi |
| 4.5 | Old Mammoth Roadpavement | 0.2 mi |
| 4.7 | Mammoth Rock Trailsingletrack | 2.7 mi |
| 7.3 | Back at Mammoth Rock Trailhead (Sherwin Creek Rd) |
Know before you go
- The Mammoth Rock Trail is narrow singletrack cut across a steep slope, on a mix of rock, firm soil and sand. The Town lists a 7% typical grade with a few short steeper spots. Walk anything that feels sketchy.
- About a quarter mile each way is on upper Old Mammoth Road, a paved road with light traffic, between the top of the Mammoth Rock Trail and the Panorama Dome trails.
- The Panorama loop sits at the edge of the Lakes Basin near Lake Mary Road. Stay on the dirt bike loop; the paved Lakes Basin Path next to it is busy with walkers.
- This ride sits between about 7,850 and 8,850 ft. The Town suggests riding the Mammoth Rock Trail before the heat of the day or in the late afternoon, and summer afternoon thunderstorms are common in the Sierra.
- Shared with hikers and horses. Yield on the descent and slow down at blind corners. E-bikes are not allowed on Inyo National Forest non-motorized trails.
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 "Rock and Dome ride, parked at Mammoth Rock Trailhead (Sherwin Creek Rd), Mammoth Lakes, California", 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
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End ride?
Turn calls, the timer and your recording stop when the ride ends.