Cascade Tunnel promo By Angela Cotey | November 23, 2009 | Last updated on November 23, 2020 Get our weekly newsletter delivered to your inbox Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Great Northern issued this promotional diagram in advance of its opening of the Cascade Tunnel at Stevens Pass, Wash. The January 2010 issue of TRAINS explores another option GN could have used to cross the mountain range. Share this article Print Facebook