CSRX announced earlier today via their FB page:
Conway Scenic wrote:Sunday, May 22, 2022, we have scheduled a special photographer's Mountaineer over Crawford Notch. This will feature a special schedule with photo run-bys to allow passengers to make staged views of the train.
This will be powered by an unsual combination of 470 Club's former Boston & Maine F7a diesels with one of our locomotives, the precise details of which will be announced on the day of the trip.
The May 22 trip will board at 9am to allow for a longer journey over Crawford.
Avatar: NHV 669 at the south end of the "Pompy" in White River Jct., VT on 4/29/1993. Photo by Richard Roberg.
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https://youtube.com/@NHVT_Productions