We had the good fortune of being able to ride the cog railway on its' season opening day in May. The ride is obviously popular since every seat was filled - to the point where the brakeman/tour guide had to give up his usual seat to accommodate all the passengers. Luckily for us, he was gracious enough to allow us the "front seat" on the way up the mountain - I would highly recommend this as the best seat in the house. The weather was cloudy and we weren't sure what to expect since up top since we could see snow. The railway runs no matter what the weather is - and rightfully so since the weather changes by the minute and is part of the fun of the ride.
The ride was about 40 minutes to the top and the information that the brakeman had was fascinating. The whole railway is fascinating, but the highlight for me was the portion known as "Jacob's Ladder" - words cannot describe the amazing engineering that went into the entire railway, but especially the portion that is the Ladder.
Once up at the summit, we were treated to a great show in terms of the weather that blew in, and then just a rapidly blew out - which meant that we had spectacular views followed by thick clouds that gave us the feeling that we were completely engulfed in clouds. The people who spend the winter working at the Mt. Washington Observatory are singularly tough individuals.
I would highly recommend this for anyone who is either a train-fan, a history buff or a weather geek who doesn't have issues with vertigo. (The kids who were on this ride seemed to have a great time.)