Amtrak's #5 banks into the tight 10 degree curve at Pinecliffe, CO following South Boulder Creek. Its head end is exiting Tunnel 29 while the tail end passes through the day-lighted Tunnel 28.
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.