On our way down from McCausland, we were traversing beneath Smithbrook road, just to the SW of the the road switchback. Pretty near the summer trailhead, probably about 47.802, -121.078
April 21, 2017, 4 p.m. PST
Weather: Sun, clear skies, felt warm
Snowpack: Very wet, heavy snow
Area Description: On the exposed, south-facing ridge to the SE of Union Peak, above USFS 6700 Road / Smithbrook. The slopes were covered in prior debris - lots of stuff sloughing off right now.
Avalanches: loose wet avalanche triggered near higher rock bands above the road. Widened to ~ hundred or more meters, crossed the upper road switchback and the toe came all the way through trees to the lower road. We did not see any broken trees, would guess D2.
Observation by Brook Peterson
Did you see any avalanches? Yes
Did you trigger any avalanches? No
Was anyone caught in an Avalanche? No