"A Lady's Life in the Rocky Mountains" is a travelogue detailing the adventures of a female explorer in the 19th century as she traverses the rugged landscapes of the Rocky Mountains. The book offers a vivid account of her encounters with diverse wildlife, treacherous terrains, and the various people she meets along the way, including a notorious outlaw. The narrative presents a compelling portrait of the American West, while also reflecting on the unique challenges and freedoms experienced by a woman traveling alone during this period.