Old Faithful geyser, sunrise.  Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #26939, all rights reserved worldwide. Old Faithful geyser.  Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #26945, all rights reserved worldwide. Old Faithful geyser at sunset, at peak eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #13361, all rights reserved worldwide.
Old Faithful Geyser Photo, Old Faithful geyser, sunrise. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named, Upper Geyser Basin, Image 26939 Old Faithful Geyser Photo, Old Faithful geyser. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named, Upper Geyser Basin, Image 26945 Old Faithful Geyser Photo, Old Faithful geyser at sunset, at peak eruption, Upper Geyser Basin, Image 13361
A crowd enjoys watching Old Faithful geyser at peak eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #13363, all rights reserved worldwide. A visitor videotapes the eruption of Lion Geyser, with Old Faithful Inn visible in the distance.  Lion Geyser, whose eruption is preceded by a release of steam that sounds like a lion roaring, erupts just once or a few times each day, reaching heights of up to 90 feet.  Upper Geyser Basin, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #13371, all rights reserved worldwide. Old Faithful geyser, peak eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07179, all rights reserved worldwide.
Old Faithful Geyser Photo, A crowd enjoys watching Old Faithful geyser at peak eruption, Upper Geyser Basin, Image 13363 Old Faithful Geyser Photo, A visitor videotapes the eruption of Lion Geyser, with Old Faithful Inn visible in the distance. Lion Geyser, whose eruption is preceded by a release of steam that sounds like a lion roaring, erupts just once or a few times each day, reaching heights of up to 90 feet. Upper Geyser Basin, Upper Geyser Basin, Image 13371 Old Faithful Geyser Photo, Old Faithful geyser, peak eruption, Upper Geyser Basin, Image 07179
Anemone Geyser erupts, Old Faithful Inn visible in the distance.  Anemone Geyser cycles about every 7 minutes.  First the pools fills, then overflows, then bubbles and splashes before erupting.  The eruption empties the pools and the cycle begins anew.  Upper Geyser Basin, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #13394, all rights reserved worldwide. Old Faithful geyser, sunrise.  Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #26940, all rights reserved worldwide. Old Faithful geyser, peak eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07180, all rights reserved worldwide.
Old Faithful Geyser Photo, Anemone Geyser erupts, Old Faithful Inn visible in the distance. Anemone Geyser cycles about every 7 minutes. First the pools fills, then overflows, then bubbles and splashes before erupting. The eruption empties the pools and the cycle begins anew. Upper Geyser Basin, Upper Geyser Basin, Image 13394 Old Faithful Geyser Photo, Old Faithful geyser, sunrise. Reaching up to 185' in height and lasting up to 5 minutes, Old Faithful geyser is the most famous geyser in the world and the first geyser in Yellowstone to be named, Upper Geyser Basin, Image 26940 Old Faithful Geyser Photo, Old Faithful geyser, peak eruption, Upper Geyser Basin, Image 07180
Old Faithful geyser at peak eruption, crowd viewing and Old Faithful Lodge, viewed from Lookout Point, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07181, all rights reserved worldwide. Old Faithful geyser at peak eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07182, all rights reserved worldwide. Old Faithful geyser during steam phase that follows the main eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07183, all rights reserved worldwide.
Old Faithful Geyser Photo, Old Faithful geyser at peak eruption, crowd viewing and Old Faithful Lodge, viewed from Lookout Point, Upper Geyser Basin, Image 07181 Old Faithful Geyser Photo, Old Faithful geyser at peak eruption, Upper Geyser Basin, Image 07182 Old Faithful Geyser Photo, Old Faithful geyser during steam phase that follows the main eruption, Upper Geyser Basin, Image 07183
Old Faithful geyser during steam phase that follows the main eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07184, all rights reserved worldwide. Old Faithful geyser at peak eruption, crowd viewing and Old Faithful Lodge, viewed from Lookout Point, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07185, all rights reserved worldwide. Old Faithful geyser at peak eruption, Upper Geyser Basin, copyright Phillip Colla Natural History Photography, www.oceanlight.com, image #07186, all rights reserved worldwide.
Old Faithful Geyser Photo, Old Faithful geyser during steam phase that follows the main eruption, Upper Geyser Basin, Image 07184 Old Faithful Geyser Photo, Old Faithful geyser at peak eruption, crowd viewing and Old Faithful Lodge, viewed from Lookout Point, Upper Geyser Basin, Image 07185 Old Faithful Geyser Photo, Old Faithful geyser at peak eruption, Upper Geyser Basin, Image 07186