Snow Observations and Avalanche on Donner Summit

We rode the Lake Run this morning. Tiny surface hoar crystals and wind affected snow was observed at the trail head on north facing slopes and along wild flower ridge. At Donner Peak the wind was moderate from the WNW. Skiing ENE of Donner Summit the small surface hoar crystals were consistent. I kicked off a small loose dry while skiing over a convexity. Ski quality was superb. On the drive back up the summit we noticed a few small wind slabs above the road on old 40 that must be a few days old because no debre was in the road. There was also another avalanche skiers left of the heart off of Donner peak. Appeared to be a wind slab and I am unsure of how old, it was too dark to see it when we arrived at the trail head.