I agree, I wouldn't take a shower during this part of the trip. You'd miss too much, when you could be looking out the windows. If you are going west out of Denver, I'd grab a seat the lounge car as soon as you can. I waited once until the train was leaving the station, and ALL the seats were taken. There are 20-some smaller tunnels west of the Moffatt Tunnel. It's amazing that these tunnels were made mostly in the 1920's. Moffatt tunnel isn't lined except the entrances, and around some of the refuges. The tunnel is very dark, except there are 21 refuges spaces throught out the tunnel that are lighted. Although you'll be going through so fast, the lights will be a blur. The tunnel is vented with huge exhaust fans to blow the engine exhaust away from the train crews. It's vented east or west depending the direction of travel. When the train is going west, fumes are exhausted to the east, right past all the passenger cars. That's why they don't want you moving from car to car in the tunnel, to try and keep the fumes out. Train crews carry oxygen tanks with them, much like fire fighters tanks, in case they have to stop for some emergency in the tunnel. Have a great, exciting trip.