Caption:
The West Thumb Paint Pots were originally named Mud Puffs by the 1878 Hayden Survey. The Paint Pots were one of the highlights for early tourists. They ventured to West Thumb by stagecoach from the Upper Geyser Basin and explored West Thumb's thermal features. From there they continued their journey by boat across Yellowstone Lake to Lake Hotel. Since the discovery of West Thumb Geyser Basin, the Paint Pots have been an active and fascinating feature of the basin. They were very similar to the Fountain Paint Pots, and they were known for the large mud cones produced by midsummer as the mud thickened. The paint pots began changing during the 1970s as roads and buildings were removed adjacent to the paint pots. Ground water now floods and inundates the pots, producing a soupy, bubbly, frothy spring. The Yellowstone National Park is a national park located primarily in the state of Wyoming, although it also extends into Montana and Idaho. Photographed by Asahel Curtis, 1928.