Thank you! I believe it's a Western maidenhair (Adiantum aleuticum). They are hardy enough to survive snow.
They grow quite well in this climate, even in pots. After a year or two of getting established, they create massive root systems and then become gigantic like this one :)
Far too many to list, but biking, mountain biking, owls, aquariums, gardening, amateur radio, and positive news, among others like NY Times Gift articles (also a sub)