JACKSON, Wyo. — This Thursday, learn all about how a 16-year-old kid from Idaho became a pioneering mountain guide in the Tetons in the 1920s.

The Jackson Hole History Museum will host free event “Paul Petzoldt: First Mountain Guide in the Tetons with Kimberly Geil” at 6 p.m. on Thursday. The event will feature the story of how Petzoldt and his climbing partner Ralph Herron made their first ascent of the Grand Teton in 1924, and how their work eventually led to the founding of Exum Mountain Guides and the National Outdoor Leadership School. Geil is the founder of the Exum History Project.

Paul Petzold in the Tetons, circa late 1920s. Photo: History Jackson Hole Collection 2003.0050.052.

On that historic expedition, Petzoldt and Herron snapped photos that had been lost for decades. The rediscovered photos will be shown at the event, marking their second-ever public appearance, according to History Jackson Hole.

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