Trail buried in snow and the affected area had no canopy overhead. 50 feet below a parallel ascending ridgeline. No loose snow, nor pinwheels had been observed. We knew we were in slide territory and proceeded carefully.. Electing to stop sidehilling along the trail and make straight for the ridge, uphill slogging was up to the chest and very slow. Another member opted to angle up, and then switchback to the ridgeline with wide high ascend turns to prevent undercutting our route below. Switching back above the path we broke below triggered the slide that filled the area we had just blazed.
Dec. 11, 2016, 11 a.m. PST
Weather: Overcast with occasional flurries.
Snowpack: Perpendicular to surface depth over 4 feet; not measured.
Area Description: 40-45 Degree slope, east facing. 2 sessions of 4 inches of snowfall had occurred within the past 24 hours atop the previous snow base. At 4250, at 21:00 on 12/10/17, wet snow was falling at Lake Angeles below.
Avalanches: Slab. with clearly visible layers. All trip and avi photos are located at: https://www.meetup.com/Kitsap-Outdoors/photos/27483119/
Observation by Douglas Terry
Did you see any avalanches? Yes
Did you trigger any avalanches? Yes
Was anyone caught in an Avalanche? No