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Hayden Expedition – Shoshone Lake

On this day 150 Years ago! (August 6, 1871) The group crosses the Continental Divide for the first time as they ride from the Upper Geyser Basin toward the West Thumb. While camping at Shoshone Lake that evening, Graham and…

Hayden Expedition – Castle Geyser

On this day 150 Years ago! (August 5, 1871) William Henry Jackson's photographs of 1871 were instrumental in convincing Congress to pass the National Park Protection Act which set aside the area as a park. On this date he captured…

Hayden Expedition – Grand Prismatic Spring

On this day 150 Years ago! (August 4, 1871) Thomas Moran draws a watercolor sketch of the Grand Prismatic Spring (top view), which he titles "Great Springs of the Firehole River." Graham is in awe of the artist's immense talent…

Hayden Expedition – Tragedy at Firehole Spring

On this day 150 Years ago! (August 2, 1871) The Hayden group explored the Lower Geyser Basin. While everyone waited for Great Fountain Geyser to erupt, Graham and a soldier (Pvt. Foley) searched the area for nearby hot springs where…

Hayden Expedition – Porcupine Hills

On this day 150 Years ago! (August 1, 1871) Mineralogist Albert Peale (who was also trained as a physician) took extensive temperature readings and samples of hot springs and other thermal features. Graham was recruited to assist Peale, who often…

Hayden Expedition – Annie Launched

On this day 150 Years ago! (July 28, 1871) The Hayden Expedition reaches Yellowstone Lake. They assemble a small boat and craft a sail from a horse blanket. The boat is named "Annie". William Henry Jackson takes a photo of…

Hayden Expedition enters the future park

150 years ago today, the Hayden Expedition entered the future park near Mammoth Hot Springs. Over the next 38 days, I will be following the survey team around the park and periodically sharing excerpts from "Burning Ground". Key events will…

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