Mt Lolo - off to a weak start

North Columbia

Caro Lafond , Monday 20th December, 2021 9:00AM

Weather conditions were: Cold, Sunny. Riding quality was ok.

Avalache Conditions: Whumpfing or drum-like sounds or shooting cracks.


We skinned up to the top of Mt Lolo following skin up tracks ending at the top of the bowl. We saw a few people riding down from there. Slightly higher than the bowl through mellower treed slope, we heard 3 small whumpfs while crossing wind loaded features. We dug a pit at the top of Mt Lolo on West aspect on a wind loaded slope to test the early December weak layer strength. We noticed 3 weak layer: one down 34cm (early december crust), at 42cm and 45cm. There is around 30cm of facets between the ground -77cm - and the 45cm crust. We got a CTVE - very easy test result (the storm slab down 34cm released while isolating the compression column with snow saw). But the other weak layer were not reactive in our compression test. There wasn't much snow in the bowl to ski without hitting stumps or rocks (maybe 30-40cm) so we decided to ski down the road back to the car. Definitively the weak layer of early December is really touchy and could worsen with increase loading of snow.