Hayden Expedition – Mud Volcano & Dragon’s Mouth
On this day 150 Years ago! (July 27, 1871)
The Hayden Expedition reaches the Mud Volcano and Dragon’s Mouth on the west bank of the Yellowstone River. A young man from Pennsylvania is dazed and confused as he awakens to find he has been transported back in time from 1971 to 1871.

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