1956 Map of Hyannis Peak

Evidence of early livestock and extractive history appears in the southeastern quadrant near Hendricks Ranch and the Matheson Reservoir. To the south, Coal Mountain stands near unnamed Mines, while a network of pack trails, including the Grass Run Trail and Siebert Creek Trail, indicates how these peaks were navigated before modern road development. The presence of Poison Ridge and Poison Creek further reflects the distinct character of this subalpine environment during the mid-1950s.