On February 10th, 2020 a snowmachiner was riding on west facing terrain above Boulder Creek. The rider triggered a slab avalanche 150′ wide, 3′ thick and running around 250′ down the slope. The rider was caught, carried and fully buried. Riders nearby saw the avalanche and began rescue efforts immediately. The rider was recovered and did not survive.
The avalanche failed on very weak faceted snow that formed during the early January dry and cold period. The slab over the weak layer was composed of hard snow that had been wind affected. The crown face thickness varied from 1 to 5 feet due to wind loading and scouring but averaged 3 feet. It is unknown where the avalanche was triggered.