Lower Falls of the Yellowstone river in winter. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2248.html Chromatic Pool in Upper Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2245.html Great Fountain geyser eruption. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0517.html Trees shadowed in thermal steam, Upper geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0506.html Colorful wall of the Grand Canyon of Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21252.html Grizzly bear and thermal steam. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell1838.html Green and red algaes in Norris geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0505.html Terraces in Great prismatic springs, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0513.html Fresh snow on foothill ridges. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0536.html West Thumb geyser basin and Yellowstone lake. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21270.html Two buffaloes head to head. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell1836.html Travertine formations in Upper geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0510.html Mud cauldron at fountain paint pot. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0518.html Mist raising from falls of the Yellowstone river. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell6025.html Elk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell1839.html Thermal steam and frosted trees. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0515.html West Thumb Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2241.html Group of buffaloes. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell1835.html Fumeroles and forest in Upper Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2246.html River and Walls of the Grand Canyon of Yellowstone, dusk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21250.html Lilies on a small lake. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0532.html Pools, West Thumb geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0521.html Yellowstone Lake with frozen shores, sunset. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2247.html Great Fountain geyser. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0538.html Steam column from Old Faithful Geyser. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell6021.html Grasses and stream. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0531.html Minerva travertine terraces, Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21263.html Frosted trees. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell8825.html Geyser cone in Upper geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0511.html Frost along the Firehole River. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell8824.html Great prismatic springs, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21267.html Yellowstone River, Grand Canyon of Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2249.html Norris geyser basin at sunrise. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0503.html Wall and River in Grand Canyon of the Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell6023.html West Thumb Geyser Basin covered by snow at dusk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2243.html Steam out of Beauty pool in Upper geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0507.html Densely clustered lodgepine tree trunks, dusk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell8823.html Canyon and Lower Falls of the Yellowstone river. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21249.html Yellowstone River and meadow in fall. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0533.html Yellowstone River, meadow, and bisons in Heyden Valley. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0535.html Castle Geyser in Upper Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2242.html Buttresses and ridges, Grand Canyon of Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0528.html Rock wall in Grand Canyon of the Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell6022.html Grand Canyon of Yellowstone and Lower Falls with snow dusting. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21248.html Steam clouds drifting from Old Faithfull geyser. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0508.html Female Elk on travertine terraces at Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0537.html Dense Lodgepole pine forest, dusk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell8822.html Two bisons. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell1844.html Ice on Yellowstone lake. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0523.html Minerva travertine terraces at Mammoth Hot Springs. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0520.html Trees and colorful mineral deposits, Grand Canyon of Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0527.html Grizzly bear. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell1837.html Steam and hill, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0516.html Tree skeletons in Black Sand basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0509.html River gorge, Grand Canyon of Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0526.html Canyon slopes, Grand Canyon of Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0529.html Falls of the Yellowstone river in Grand Canyon of the Yellowstone. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell6024.html Bare trees on hill. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0534.html Dead trees and turquoise pond in Norris Geyser Basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21265.html Great prismatic springs, thermal steam, and hill, Midway geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0514.html River and Walls of the Grand Canyon of Yellowstone, dusk. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell21251.html Thermal activity at Norris geyser basin. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0504.html Yellowstone River and meadow in fall. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell2244.html Ice on a small lake. Yellowstone National Park, Wyoming, USA. http://www.terragalleria.com/parks/np-image.yell0530.html