BIG TEN
Amtrak 6 the California Zephyr descends the Rocky Mountains through Big Ten, Little Ten in Arena, and then Rocky and beyond to Leyden in this 753-second = 12.55 minute exposure over Denver, Colorado. All the signals from east Eisele through the signal almost to Leyden into Arvada can be seen in this image defining the engineering marvel of the Moffat Road.
A continuously growing album of photos that IMHO reveal the awesome and seldom-seen beauty of the railroad world from the dimming of day to dawn's early light! From dusk to dawn, trains roll on! (I'm still finding gems of sunset-to-sunrise surprises!)