1963 Map of Peterson Ridge

About this map

The North Fork Walla Walla River and its various tributaries carve through the dramatic high country along the border of Oregon and Washington. This 1960s survey captures the intersection of Umatilla Co and Walla Walla Co within a landscape defined by prominent geographical landmarks like Saddle Mountain and Blalock Mountain. The terrain is marked by a complex system of ridges, including Pine Ridge and Peterson Ridge, which channel water into Middle Fork Walla Walla River and South Fork Walla Walla River. Communication and transport infrastructure of the mid-century are evidenced by the Pikes Peak Radio Tower and the winding path of Mormon Grade. Lower elevations near Little Meadows and the various springs throughout the canyons suggest the vital role of water management in this high-altitude drainage basin.