I’m from NH, those are often used in winter rescues or deliveries to the weather station up there when the road is impassible. They also do trainings. They’re much more resilient against the treacherous conditions at the top of Mt. Washington than other helicopters.

This is the time of year when Everest training mountaineers are in NH summiting Washington to prepare for their trip over to Nepal. May also have something to do with that.