1980 Map of Yamhill River

About this map

The Yamhill River and its major southern tributary, the South Yamhill River, dominate the inland drainage of this region, flowing from the Coast Ranges toward the fertile valleys to the east. This 1980s-era study captures the landscape as it transitions from the dense timberlands of the Siuslaw National Forest and Tillamook State Forest to the agricultural reaches of Yamhill and Polk counties. In the western portion, the Pacific coastline is defined by prominent landmarks like Cape Lookout and Cape Meares, where small coastal communities like Pacific City and Netarts reside near the estuaries. Further inland, the map details the infrastructure of timber and transit, showing the Southern Pacific rail lines connecting towns such as Sheridan, Willamina, and Ballston. The presence of the Grand Ronde Agency and the Cascade Head Experimental Forest highlights the managed nature of these coastal and valley resources during the late twentieth century.