A deepening of late day shadows envelops the Front Range mountains west of Denver, Colorado, on June 9, 2013, as Amtrak’s eastbound California Zephyr rolls through Eisele on a two percent descending grade. Some of the Flat Iron rock formations located above Boulder jut up in the shaded purplish blue background.
Two Amtrak routes serve the Centennial State. The California Zephyr's route through Moffat Tunnel and along the Colorado River goes from one end of the state to the other. The Southwest Chief cuts across the southeast corner.
