 Sign at entrance to Yellowstone National Park |
 Lewis Falls |
 Yellowstone Lake |
 American buffalo (bison) on the plains at sunset |
 Bison in the setting sun |
 Our cabin at Island in the Sky, Idaho |
 West Yellowstone, Montana |
 Ice falling from the roof at the gas station |
 On the Madison river in Yellowstone in the morning |
 On the Madison river in Yellowstone in the morning |
 On the Madison river in Yellowstone in the morning |
 In the Terrace Spring area |
 Heat and cold in the Terrace Spring area |
 Hot and cold in the Terrace Spring area |
 In the Terrace Spring area |
 In the Terrace Spring area |
 Bacterial growth in the water in the Terrace Spring area |
 In the Terrace Spring area |
 The boardwalk in the Terrace Spring area |
 On the boardwalk in the Terrace Spring area |
 Gibbon Falls |
 Downstream of Gibbon Falls on the Gibbon River |
 Gibbon Falls |
 Gibbon Falls |
 Bison |
 American Buffalo (bison) |
 Bison |
 American Buffalo (bison) |
 Through the Golden Gate Canyon to Mammoth Hot Springs |
 Through the Golden Gate Canyon to the Mammoth Hot Springs area of the park |
 A basin of volcanic activity near Mammoth Hot Springs |
 Steam rises over the geyser plane next to Mammoth Hot Spring |
 Viewpoint over Mammoth Hot Springs |
 Fort Yellowstone, Mammoth Hot Springs |
 Fort Yellowstone, Mammoth Hot Springs area of Yellowstone NP |
 On the Mammoth Terrace Drive |
 Steam and snow, Mammoth Terrace Drive |
 Result of a mix of hot water and cold air |
 Orange Spring Mound |
 Orange Spring Mound |
 Orange Spring Mound |
 Orange Spring Mound |
 Travertine terraces along Mammoth Terrace Drive |
 White Elephant Back terrace |
 Steam and snow, Mammoth Terrace Drive |
 Steam and snow, Mammoth Terrace Drive |
 Seen from Mammoth Terrace Drive |
 Terraces at Mammoth Hot Springs |
 Hillside at Mammoth Hot Springs |
 Steam from a vent on a snow covered hill |
 Driving through Yellowstone |
 Fly fishing in the morning |
 An area of underground activity |
 Fly fishing |
 Just in time arrivial at Old Faithful Geyser |
 Old Faithful in the initial stages of eruption |
 Old Faithful building up steam |
 Old Faithful geyser |
 Old Faithful geyser, Yellowstone NP |
 Old Faithful geyser towards end of eruption |
 Old Faithful geyser after eruption |
 The Old Faithful Inn |
 An opening into the Underworld, Black Sand Basin |
 Hot Spring, Black Sand Basin, Yellowstone |
 Black Sand Basin |
 Black Sand Basin |
 Black Sand Basin |
 Seen in Black Sand Basin |
 Bacterial stream, Black Sand Basin |
 A geyser basin |
 Starting out on the Fountain Paint Pot trail |
 Bacterial pool |
 From the Fountain Paint Pot trail |
 From the Fountain Paint Pot trail |
 Fountain Paint Pot mudpot |
 Red Spouter |
 Evening sun through the rising steam |
 Sream emanating from a vent - Fountain Paint Pot trail |
 From the Fountain Paint Pot trail in the evening |
 Turning back on a slippery Fountain Paint Pot trail |
 Walking on a slippery Fountain Paint Pot trail |
 Near sunset from Fountain Paint Pot trail |
 From the Fountain Paint Pot trail |
 Sunset as we depart Fountain Paint Pot trail |