Fresno Bowl, Outside of the Mammoth Mtn Ski Area Boundary
Saturday, April 7, 2018 - 2:30pm
This avalanche occured outside of the Mammoth Mtn Ski Area boundary in Fresno Bowl, likely during the rain event on 4/7. R3.5/D3.5. Crown was 30” avg, 40” max. Ran approximately 3000’ with four distinct lobes, the widest was approx 500’. The lowest lobe was on a 10-15 degree slope. The center of the gully looked like a mud slide, so sections obviously ran to the ground. But the bed surface on all 4 of the lobes was old snow, possibly a sun crust.
This slide occured naturally in an area where avalanches are not mitigated. Remember that EVERYTHING beyond the ski area boundary is backcounty. "Side country" is backcountry.
Thank's the MMSP for the report.