Lodgepole PinesWinter TransportationYellowstone StreamOld Faithful Eruption at SunriseFrosted Evergreen TreesOld Faithful Eruption at minus 25 degreesCastle Geyser and RainbowLone Frosted TreeYellowstone-9Old Faithful and Full MoonBull ElkCastle GeyserYellowstone TundraBison in a Snow StormThe Firehole River