Bison
Madison River
Madison River
Beryl Spring
Beryl Spring
Beryl Spring
Monument Geyser Basin
Monument Geyser Basin
Monument Geyser Basin
Monument Geyser Basin
Monument Geyser Basin
Norris Geyser Basin
Steamboat Gayser, Norris Geyser Basin
Steamboat Geyser
Steamboat Geyser
Steamboat Geyser
Steamboat Geyser
Steamboat Geyser
Steamboat Geyser
Downstream from Steamboat Geyser
Steamboat Geyser, seen from below
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Thomas
Bacteria at work
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Mystic Spring, Norris Geyser Basin
Mystic Spring, Norris Geyser Basin
Mystic Spring, Norris Geyser Basin
Puff'n Stuff Geyser, Norris Geyser Basin
Puff'n Stuff Geyser, Norris Geyser Basin
Puff'n Stuff Geyser, Norris Geyser Basin
Puff'n Stuff Geyser, Norris Geyser Basin
Black Hermit Cauldron, Norris Geyser Basin
Black Hermit Cauldron, Norris Geyser Basin
Norris Geyser Basin
Green Dragon Spring, Norris Geyser Basin
Green Dragon Spring, Norris Geyser Basin
Green Dragon Spring, Norris Geyser Basin
Norris Geyser Basin
Blue Mud Steam Vent, Norris Geyser Basin
Blue Mud Steam Vent, Norris Geyser Basin
Yellow Funnel Spring, Norris Geyser Basin
Yellow Funnel Spring, Norris Geyser Basin
Yellow Funnel Spring, Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Pearl Geyser, Norris Geyser Basin
Pearl Geyser, Norris Geyser Basin
Pearl Geyser, Norris Geyser Basin
Pearl Geyser, Norris Geyser Basin
Pearl Geyser, Norris Geyser Basin
Norris Geyser Basin
Vixen Geyser, Norris Geyser Basin
Vixen Geyser, Norris Geyser Basin
Norris Geyser Basin
Fearless Geyser, Norris Geyser Basin
Fearless Geyser, Norris Geyser Basin
Monarch Geyser Crater, Norris Geyser Basin
Monarch Geyser Crater, Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Norris Geyser Basin
Roaring Mountain
Roaring Mountain
Roaring Mountain
Roaring Mountain
Water fall
Golden Gate
Golden Gate
Yellowstone National Park
Yellowstone National Park
Yellowstone National Park
Yellowstone National Park
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Lower Terraces
Mammoth Hot Springs, Upper Terraces
Mammoth Hot Springs, Upper Terraces
Mammoth Hot Springs, Angel Terrace
Mammoth Hot Springs, Angel Terrace
Mammoth Hot Springs, Angel Terrace
Mammoth Hot Springs
Mammoth Hot Springs
Mammoth Hot Springs
Little bird
Mammoth Hot Springs
Mammoth Hot Springs
Mammoth Hot Springs
Lava Creek
Undine Falls
Undine Falls
Petrified Tree
Petrified Tree
Petrified Tree
Yellowstone River, downstream from Tower Fall
Yellowstone River, downstream from Tower Fall
Yellowstone River Canyon
Yellowstone River, downstream from Tower Fall
Yellowstone River, downstream from Tower Fall
Yellowstone River, downstream from Tower Fall
Yellowstone River, downstream from Tower Fall
Yellowstone River, downstream from Tower Fall
Alicia and I at Tower Fall
Tower Fall
Tower Fall
What remains after the great 1988 fire
What remains after the great 1988 fire
Upper Falls
Yellowstone River Canyon
Yellowstone River Canyon
Lower Falls, seen from above
Yellowstone River, upstream from Lower Falls
Lower Falls, seen from Inspiration point
Yellowstone River, seen from Inspiration Point
Yellowstone River, seen from Inspiration Point
Yellowstone River, seen from Inspiration Point
Yellowstone River, upstream from Upper Falls
Yellowstone River, upstream from Upper Falls
Bison
Bison
Bison
Bison
Bison
Bison
Sulphur Cauldron
Sulphur Cauldron
Mud Volcano
Mud Volcano
Sulphured water spring
Sulphured water
Mud Volcano
Mud Volcano
Mud Volcano
Yellowstone Lake
Yellowstone Lake
Sunset on Old Faithful