A vivid autobiographical account, Pony Trails in Wyoming captures the authentic experiences of John K. Rollinson as a cowboy and U.S. ranger in early 20th-century Wyoming. Rollinson recounts his arrival in Cheyenne in 1903, life on cattle roundups, wild-horse breaking, traplines, and life-threatening rescues—such as defending an heiress from danger. He also served as a Yellowstone Timber Reserve ranger, patrolling Sunlight Basin's rugged terrain on horseback. His stories reveal not just grit and adventure, but the camaraderie and code of honor among frontier men. With warm humor and candid reflection, Rollinson portrays the transformation from eager greenhorn to seasoned cowboy, offering readers a rare, boots-on-the-ground view of life on the open range before modernization. This book remains a gem for fans of Western memoirs, environmental history, and the early conservation ethos.