1. A steam plume rising off of Castle Geyser during an eruption.

    Castle Geyser, Yellowstone National Park. May, 2019.

    Published on August 8, 2019

  2. A steam column rising off of Castle Geyser during an eruption.

    Castle Geyser, Yellowstone National Park. May, 2019.

    Published on August 8, 2019

  3. A huge steam column rising off of an eruption of Old Faithful in the distance.

    Old Faithful, Yellowstone National Park. May, 2019.

    Published on August 7, 2019

  4. The inscription at the top of the Roosevelt Arch in Yellowstone National Park, which reads "for the benefit and enjoyment of the people".

    Roosevelt Arch, Yellowstone National Park. May, 2019.

    Published on August 3, 2019

  5. A huge calcified boulder in front of Soda Butte, in the Lamar Valley.

    Soda Butte, Lamar Valley, Yellowstone National Park. May, 2019.

    Published on August 2, 2019

  6. A huge calcified boulder in front of Soda Butte in the Lamar Valley.

    Soda Butte, Lamar Valley, Yellowstone National Park. May, 2019.

    Published on August 1, 2019

  7. A small tree growing at the top of a massive hoodoo in Yellowstone.

    The Hoodoos, Yellowstone National Park. May, 2019.

    Published on August 1, 2019

  8. Trees and bushes growing among the rocks of the Hoodoos in Yellowstone.

    The Hoodoos, Yellowstone National Park. May, 2019.

    Published on July 31, 2019

  9. A winding road in the Hoodoos, Yellowstone National Park.

    The Hoodoos, Yellowstone National Park. May, 2019.

    Published on July 31, 2019

  10. The Roosevelt Arch at Yellowstone National Park on a sunny afternoon. The inscription at the top reads "for the benefit and enjoyment of the people".

    Roosevelt Arch, Yellowstone National Park. May, 2019.

    Published on July 30, 2019

  11. Detail of the texture of the terraces at the Mammoth Hot Springs.

    Mammoth Hot Springs, Yellowstone National Park. May, 2019.

    Published on July 28, 2019

  12. A dead, calcified tree sticking out of the water of the Mammoth Hot Springs.

    Mammoth Hot Springs, Yellowstone National Park. May, 2019.

    Published on July 28, 2019

  13. The calcified terraces of the Mammoth hot springs in Yellowstone.

    Mammoth Hot Springs, Yellowstone National Park. May, 2019.

    Published on July 27, 2019

  14. Mountains in the Absaroka Range, shrouded in fog behind a forested area in Yellowstone National Park.

    Absaroka Range, Yellowstone National Park. May, 2019.

    Published on July 26, 2019

  15. Barronette Peak, shrouded in fog.

    Barronette Peak, Yellowstone National Park. May, 2019.

    Published on July 25, 2019

  16. The Roosevelt Arch at Yellowstone National Park on a foggy, rainy morning. The inscription at the top reads "for the benefit and enjoyment of the people".

    Roosevelt Arch, Yellowstone National Park. May, 2019.

    Published on July 22, 2019

  17. A rocky cliff face covered in snow and trees at Yellowstone National Park.

    Golden Gate Canyon, Yellowstone National Park. May, 2019.

    Published on July 22, 2019

  18. The rocky walls of the Grand Canyon of the Yellowstone.

    Grand Canyon of the Yellowstone, Yellowstone National Park. May, 2019.

    Published on July 18, 2019

  19. The Yellowstone River in Yellowstone National Park. Its banks are covered on snow, and in the background, rolling hills and a line of trees can be seen.

    Hayden Valley, Yellowstone National Park. May, 2019.

    Published on July 18, 2019

  20. Two bison walking on the Gros Ventre Road.

    Bison on the Gros Ventre Road, Grand Teton National Park. March, 2019.

    Published on June 19, 2019

  21. National Elk Refuge road covered in snow, with the north end of Millers Butte in the distance.

    National Elk Refuge, Wyoming. January, 2019.

    Published on May 30, 2019

  22. Mount Moran and a snow-covered frozen Jackson Lake, and lots of wispy clouds in the sky.

    Mount Moran & Jackson Lake, Grand Teton National Park. January, 2019.

    Published on May 22, 2019

  23. Steam rising from the Snake River at sunset.

    Snake River, Grand Teton National Park. January, 2019.

    Published on May 21, 2019

  24. The Tetons, seen from the Teton Point Turnout.

    Teton Point, Grand Teton National Park. January, 2019.

    Published on May 21, 2019