The B Trail, part of the Winter Grooming Snowmobile System for over-snow vehicle (OSV) snowmobile use, is a pleasantly undulating winter trail that connects the A Trail with the C and H Trails on the north side of the Mammoth Scenic Loop. Groomed and marked with orange diamonds and intersection signs, the trail winds through the open, old-growth Jeffrey pine forest on the north side of the Mammoth Knolls, then crosses the pavement on the Scenic Loop right at the OSV staging area at the Inyo Craters Road. The B Trail meets the C and H Trails at a three-way junction on the south end of the craters. 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.
B Trail - Groomed Snowmobile Trail 4.7 mi
Avalanche Forecast for 12/02/2023
- AVALANCHE FORECAST: Isolated wind-protected slopes at upper elevations have enough continuous coverage for avalanche formation. If venturing into those areas be on the lookout for stiff wind-deposited snow sitting on top of weak sugary snow. Keep in mind that even a small slide could be more dangerous than usual with early-season obstacles in the runout. Find out More
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Trail Activities
Public Services
Trail Information
- Snow
- A standard ramp is 8%. Conditions subject to change.
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This trail can be accessed from the junction of Inyo Craters Road and and the Mammoth Scenic Loop.
- Get driving directions to jct. of Inyo Craters Road + Mammoth Scenic Loop
- Get public-transit options*
*Note that not all facilities are accessible via public transit.
Related Experiences
Dog Sledding the A, B, K Trails Loop
9.0 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
Snowmobiling Shady Rest to Deadman Creek
22.3 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
Snowmobiling Shady Rest to Minaret Vista
23.2 mi
- Rating: ,
- Surface: Snow,
- Duration: Half day
Related Experiences
Experience | Rating | Length (mi) | Surface | Duration |
---|---|---|---|---|
Dog Sledding the A, B, K Trails Loop | 9.0 | Snow | Half day | |
Snowmobiling Shady Rest to Deadman Creek | 22.3 | Snow | Half day | |
Snowmobiling Shady Rest to Minaret Vista | 23.2 | Snow | Half day |




