Came across this slide while on a low elevation hike after ditching attempts to make it up LCC on the 18th. It slid late the night of the 17th or early in the morning of the 18th. We could not see the crown, but our hypothesis is that the slide could have been caused by a natural storm snow avalanche in one or multiple of the upper bowls which stepped down to the ground when it hit the gully at about 7500 feet. Our main observation with this avalanche is that it continued down the gully for an estimated 4500 feet, traveling a conservative estimate of 1500 vertical feet. It is easily discernible from the valley due west of Buckley Mountain. Pretty gnarly.