From searing desert heat to snow-capped mountains, with its curves, tunnels, nonstop parade of trains, and famed Loop, Tehachapi offers mainline railroading excitement like no other place in the world. Now Pentrex brings you the most expansive tour of Tehachapi ever produced, with a full 8 hours of incredible action recorded on two discs. All new footage shot through the changing seasons over a three-year period brings you the beauty and challenges of railroading over this mountain pass, including snowstorms on Tehachapi. Over 300 BNSF, Union Pacific, and other trains are shown as they climb steep grades, brake downgrade, spiral around horseshoe curves and the famous Loop, and snake through the tunnels. These trains are powered by a huge assortment of owned and leased motive power ranging from older GP30s and SD40-2s to the latest SD70ACEs and GEVOs, and the variety of traffic, including special movements such as the Red and Blue Unit circus trains, is astonishing.