“Pioneer Days in Malheur County” by Jacob Ray Gregg is a comprehensive historical account that seeks to perpetuate the memory of prominent pioneers and preserve an authentic history of Malheur County, Oregon. This privately printed volume, published in 1950 by L. L. Morrison in Los Angeles, spans 442 pages and provides a broad narrative of the region’s history, covering significant events and developments from the mid-19th century onwards. Key locations discussed include Ontario, Vale, Nyssa, Westfall, Harper, Juntura, Ironside, Brogan, and Jamieson. The work also delves into critical historical topics such as the Bannock War and the Overland Trail, alongside accounts of early pioneer life.