Gibson Jack RNA Assessment - Gibson Jack is the largest RNA in the forest and contains about 2,200 acres. It is located six miles south of Pocatello, Idaho on the Westside Ranger District. It was established on April 1, 1982. The goal is to maintain and preserve stands of Bigtooth Maple and shrub types along with other features such as beaver dams and ponds within the RNA boundary. The RNA represents an area that has not been grazed by livestock for over 75 years. In an area where it is difficult to find ungrazed areas, the Gibson Jack RNA is significant as a baseline monitoring area. It is used by faculty and students at Idaho State University for research and educational purposes.