early last week, during my travels south to Utah.
Geothermal steam during a chilly early morning at Norris Geyser Basin, the hottest part of the caldera.
Norris Geyser Basin painted with various colorful heat-tolerant bacteria.
Gibbon Falls (84 feet (26 m) tall).
So-called Black Pool at West Thumb.
Fishing Cone on the shore of Yellowstone Lake at West Thumb. Jim Bridger tells a tall tale here: “When he needed a quick meal, Bridger would catch a trout and reel it in slowly, allowing time for it to cook on the line as it passed through the hot water.”
Grand Prismatic Spring at Midway Geyser Basin. (Click image to enlarge.)
Elk calf slowly nodding off on the warm ground near a geothermal vent.
Grand Geyser, in the Upper Geyser Basin, fountaining as high as 200 ft (60 m).
Last but not least, Old Faithful.