Just a long shot, does anyone know the freq. for the Franklin County Snowmobile groomers. They just had radio's installed this winter. I think UHF
Since it is Franklin County, given the proximity to Canada and all the associated issues of licensing border areas, I would tend to think they didn't get their own channels.
You may be able to figure it out based on who the groomers work for. If a town, village, or county employs them, then they'll likely operate on existing frequencies used by those agencies.
If they're operated by a club or private company, anything is possible. If you think they're using UHF radios, maybe a good place to start is the GMRS channels. Easy to license and inexpensive to buy. And no conflict with Canadian channels.