A ride of one of the most spectacular stretches of railroad, the former Rio Grande Moffat Tunnel line. Ride the cab of Amtrak’s California Zephyr and see the entire line from Denver to Glenwood Springs.Part 1 (this part) takes you through 30 tunnels, to the famous six-mile long Moffat Tunnel. The view is entirely looking straight ahead, with ambient sound from inside the locomotive cab.