Theodore Roosevelt Jr. was the 26th president of the United States, known for his conservation efforts and trust-busting policies. He pursued the protection of millions of acres of land through national forest reserves.

Gifford Pinchot was a pioneering forester and politician who served as head of the United States Forest Service. He was a key figure in President Roosevelt’s conservation efforts.

William B. Greeley was one of the first forest rangers in the new Forest Service and later became its chief. He transitioned to the timber industry after leaving the Forest Service.

Elers Koch was an original forest ranger who dedicated 40 years to the Forest Service. He authored the book "40 Years a Forester," recounting his experiences.

Edward Crocket Pulaski served as a Forest Service ranger and is known for his heroics during the great fire of 1910. He invented a tool, named after him, that is used by firefighters.

Senator Clark was a powerful businessman and senator who opposed conservation policies. He was instrumental in founding Las Vegas and influenced many political decisions.

Senator Weldon Brinton Heyburn from Idaho was known for his opposition to conservation efforts led by Roosevelt and Pinchot. His name is commemorated in locations across Idaho.