mark willocks:
Soda Butte Creek - Yellowstone
mark willocks:
Lower Falls Yellowstone River
mark willocks:
Yellowstone Canyon Wall
mark willocks:
Grand Canyon of the Yellowstone
mark willocks:
Lodgepole Pine Bark
mark willocks:
Lodgepole Pine Trunk
mark willocks:
Grand Prismatic Spring
mark willocks:
Yellowstone River Reflections
mark willocks:
Hayden Valley Cloudscape
mark willocks:
Yellowstone River with Cloudscape
mark willocks:
Yellowstone River Just Before Sunset