GUNNISON COUNTY, Colo. — Fall is being edged out by wintry conditions in Colorado's mountains, and a clear sign of that came on Friday with a report of the first human-triggered avalanche of the season.

The Colorado Avalanche Information Center (CAIC) said the slide occurred near Treasury Mountain in the Elk Mountains southeast of Marble. It was ranked a D1, meaning it was "relatively harmless to people" on the D-scale, which ticks up to D5 to indicate the most dangerous and destructive slides.

"This setup reminds us that even small early-season slides can happen on steep slopes where you find ~10 inches or more of consistent snow," CAIC wrote on social media .

Almost every fall, avalanches catch people seeking to ski or snowboard on the early snow, or late-season hunters, the organ

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