Bison refuelling in Lamar River, Lamar Valley - Yellowstone National Park |
Lamar River, Lamar Valley - Yellowstone National Park |
Bison in Lamar Valley - Yellowstone National Park |
Bison grazing - Yellowstone National Park |
Bison in traffic - Yellowstone National Park |
Bison - Yellowstone National Park |
Feeding Bison - Yellowstone National Park |
Roosevelt Lodge - Yellowstone National Park |
Roosevelt Lodge - Yellowstone National Park |
View of the Grand Canyon and Yellowstone River from Calcite Springs Overlook - Yellowstone National Park |
Yellowstone River - Yellowstone National Park |
Yellowstone River, Grand Canyon and the Columnar Basalt formations - Yellowstone National Park |
Tower fall (132 feet) - Yellowstone National Park |
Brink of the Tower Fall - Yellowstone National Park |
The Upper Falls and the Yellowstone River - Yellowstone National Park |
Bird - Yellowstone National Park |
Rainbow at the Upper Falls - Yellowstone National Park |
Yellowstone River - Yellowstone National Park |
Yellowstone in the Canyon - the reason for the naming of the park |
Canyon and river view from Artist Point - Yellowstone National Park |
View from Artist Point - Yellowstone National Park |
Brink of the Lower Falls (308 feet)View from Artist Point - Yellowstone National Park |
View from Inspiration Point - Yellowstone National Park |
Glacial Boulder (500 ton) - Yellowstone National Park |
Bison near Norris - Yellowstone National Park |
Steamboat Geyser, Norris Geyser Basin - Yellowstone National Park |
Cistern Spring, Norris Geyser Basin - Yellowstone National Park |
Boiling spring, Norris Geyser Basin - Yellowstone National Park |
Sunset at Norris Geyser Basin - Yellowstone National Park |
Sunset - Yellowstone National Park |
Sunset - Yellowstone National Park |
Sunset - Yellowstone National Park |
Elk at Dawn, West Entrance - Yellowstone National Park |
Elk - Yellowstone National Park |
Sunrise - Yellowstone National Park |
Madison River at Sunrise - Yellowstone National Park |
Fountain Paint Pot, Lower Geyser Basin - Yellowstone National Park |
Mud Pot, Fountain Paint Pots, Lower Geyser Basin - Yellowstone National Park |
Lower Geyser Basin - Yellowstone National Park |
Raven - Yellowstone National Park |
Midway Geyser Basin - Yellowstone National Park |
Draining hot water into the Firehole River, Midway Geyser Basin - Yellowstone National Park |
Firehole River - Yellowstone National Park |
Excelsior Geyser, Midway Geyser Basin - Yellowstone National Park |
Midway Geyser Basin - Yellowstone National Park |
Hot water carving the Midway Geyser Basin - Yellowstone National Park |
Grand Prismatic Spring (Largest hot spring - 380 feet), Midway Geyser Basin - Yellowstone National Park |
Grand Prismatic Spring - Yellowstone National Park |
Grand Prismatic Spring - Yellowstone National Park |
Snow in Mammoth Hot Springs - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Old Faithful, Upper Geyser Basin - Yellowstone National Park |
Old Faithful erupting (approx. 90 minute frequency) - Yellowstone National Park |
Old Faithful erupting - Yellowstone National Park |
Beauty Pool, Upper Geyser Basin - Yellowstone National Park |
Heart Spring, Upper Geyser Basin - Yellowstone National Park |
Chromatic Spring, Upper Geyser Basin - Yellowstone National Park |
Chromatic Spring, Upper Geyser Basin - Yellowstone National Park |
Daisy Geyser, Upper Geyser Basin - Yellowstone National Park |
Morning Glory Pool, Upper Geyser Basin - Yellowstone National Park |
Grand Geyser Eruption, Upper Geyser Basin - Yellowstone National Park |
Firehole River, Upper Geyser Basin - Yellowstone National Park |
Crested Pool, Upper Geyser Basin - Yellowstone National Park |
Giant Geyser, Upper Geyser Basin - Yellowstone National Park |
Shoshone Point - Yellowstone National Park |
Mud Volcano, West thumb area - Yellowstone National Park |
West Thumb Lake - Yellowstone National Park |
Fishing Cone, West Thumb - Yellowstone National Park |
Black Pool, West Thumb Geyser Basin - Yellowstone National Park |
Bear marks? - Yellowstone National Park |
Elk, West Thumb area - Yellowstone National Park |
Elk on the road - Yellowstone National Park |
Yellowstone Lake - Yellowstone National Park |
Bison in Hayden Valley - Yellowstone National Park |
Liberty Cap, Mammoth Hot Springs - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Absoraka Range, Gardiner to Livingston, Montana |
Absoraka Range, Gardiner to Livingston, Montana |
Absoraka Range, Gardiner to Livingston, Montana |
Kepler Cascades - Yellowstone National Park |
Isa Lake, Great Continental Divide - Yellowstone National Park |
Deer in Hayden Valley - Yellowstone National Park |
Elk Antlers, Hayden Valley - Yellowstone National Park |
Mammoth - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Limestone at Mammoth Hot Springs - Yellowstone National Park |
Layers of Limestone, Mammoth Hot Springs - Yellowstone National Park |
Layers of Limestone, Mammoth Hot Springs - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Petrified Tree, North Loop (15 million years old) - Yellowstone National Park |
Undine Falls (60 feet), Mammoth to Tower - Yellowstone National Park |
Yellowstone National Park |
Roosevelt tower, North Entrance - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Park Ranger at Mammoth - Yellowstone National Park |
Mammoth Hot Springs - Yellowstone National Park |
Blacktail Pond, Blacktail plateau - Yellowstone National Park |