Not your average snowmobile attire yet fashionable for the time: winterkeeper Steve Fuller looks more like a WWII bomber pilot or Arctic explorer. Never without a camera, here he makes a pit stop at Roaring Mountain on his way back to Canyon from Mammoth Hot Springs via snowmobile in January 1989. The lodgepole pine forest behind him had burned only a few months earlier during the historic 1988 Yellowstone fires. The ambient temperature on that day was minus 25 degrees F. Photo by Todd Wilkinson