Sledding down the auto road is not allowed due to it still being an active road in the winter. Snow tractors from the observatory and State Park run up and down the mountain at any given time of day and Snow Coaches run on a frequent schedule to half way up the road. So you will constantly risk getting run over or hit when swinging around the corners at a fast pace. I know you think you'll be able to stop in time or they will be able to stop on a dime but having attempted sled trips in the past, this isn't the case. This is why even the observatory isn't allowed to sled down any longer.
Originally Posted by jmac
Staff Meteorologist/Night Observer, KMWN (Mt Washington Obs., NH)