Moments before the sun tucks itself behind the mountains for the night, rays of light shine down onto Canadian National northbound #571 as it climbs the grade through Cheakamus Canyon.
As the sun begins to set on a winter day in northern Arizona, a Los Angeles to Chicago UPS train works hard up the grade out Kingman as it goes through the eastbound control signals of Walapai.
Less than 20 miles from its destination of Harrisburg, stack train 202 accelerates up the small grade out of Boiling Springs on a splendid late-spring evening.