Timberline is summer fun! On Labor Day, the bump run was a leftover from Ski Team training, so the bumps were wonderfully consistent. Temperature and snow consistency were good, with overnight freezing, and midday softening - perfect "spring skiing." The "dirt" on portions of the mountain comes from forest fire lower on the hill, and some dust blown off of the volcanic rocks.
Here's Patrick Deneen practicing on the mogul line at Mt. Hood a few years back