From headwaters in Canada, the Columbia River flows over twelve hundred miles to the Pacific Ocean and for many of those miles it marks the boundary between the states of Washington and Oregon. Cutting through the Cascade Mountains, the river slices through an 80-mile stretch known as the Columbia River Gorge where the basalt mountains tower up to 4,000 feet above the water. Nearby dormant volcanoes such as Mount Hood and Mount Adams add to the incredible beauty of the Gorge area. Following the north bank of the river between Vancouver and Pasco, Washington is Burlington Northern Santa Fe's Fallbrook Subdivision. This is a prized site for railfans, offering spectacular vistas and nonstop railroading. Journey with Pentrex from Vancouver east to Maryhill along this scenic route and experience the variety of trains and motive power that ply this famous line.

Climbing gently from the tidewater ports near Portland, Oregon is the Columbia River Gorge'a wide, flat-water river passage that provides access to the inland agricultural regions of Washington and Oregon and divides the two states along most of their border. It is a spot of unparalleled beauty that hosts two railroad lines: BNSF to the north and Union Pacific along the southern shore. In Columbia River Gorge Volume I: BNSF's Fallbridge Subdivision, Pentrex explored the BNSF side of the Gorge, heading east from Vancouver, Washington to the arid desert mountains near the John Day Dam. Now, in Volume 2, we jump across the river to head back west toward Portland following Union Pacific's Portland Subdivision.