The Columbia River feeds off of one of the largest watersheds in the US, flowing for over 1,200 miles. Join ZSE from 2359z to 0400z on February 12th in flying part of this majestic journey from part of the river basin in the Tri-Cities (KPSC), through the Washington and Oregon countryside to Portland, Oregon (KPDX) situated about 100 miles east of the mouth of the river.