The G Trail, part of the Winter Grooming Snowmobile system for over-snow vehicle (OSV)/snowmobile use, represents the majority of the main winter trail between Mammoth Lakes and June Lake Junction. Groomed and marked with orange diamonds, the trail begins from the OSV tunnel under Hwy 395 and stays on the west side of the highway. After crossing the Mammoth Scenic Loop, it heads out across the open, scenic terrain of Dry Creek Flats, then climbs to Obsidian Dome, once an important source of volcanic glass for native arrowheads. There is a general store and gas station at the junction of Highway 395 and Highway 158. The Winter Grooming Snowmobile System is groomed by the U.S. Forest Service with funding provided by the California Department of Parks and Recreation, using monies generated by registration fees and gasoline taxes.
G Trail - Groomed Snowmobile Trail 13.4 mi
Conditions Update
- 02/04/2021: OSV Network Update: G Trail was groomed from the A Trail Intersection to Obsidian Dome on February 3rd. The Lower Obsidian Dome Loop was also groomed for Non-Motorized use.
Avalanche Forecast for 02/24/2021
- AVALANCHE FORECAST: LOW avalanche danger exists at all elevations. Sunny skies will be tempered by an increase in mid-slope winds today keeping minor Loose Wet concerns confined to lower elevation steep protected southerly (SE-S-SW) facing terrain. Find out More
-
Trail Activities
Public Services
Trail Information
- Snow
- A standard ramp is 8%. Conditions subject to change.
-
This trail can be accessed at the junction of Highway 395 and Bald Mountain Road or the junction of Highway 395 and the Mammoth Scenic Loop.
- Get driving directions to Highway 395 and Bald Mountain Road
- Get driving directions to Jct Hwy 395/ Mammoth Scenic Loop
- Get public-transit options*
*Note that not all facilities are accessible via public transit.
Related Experiences
Snowmobiling Shady Rest to Bald Mountain
52.3 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
Snowmobiling Shady Rest to Deadman Creek
22.3 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
Related Experiences
Experience | Rating | Length (mi) | Surface | Duration |
---|---|---|---|---|
Snowmobiling Shady Rest to Bald Mountain | 52.3 | Snow | Half day | |
Snowmobiling Shady Rest to Deadman Creek | 22.3 | Snow | Half day |




