This morning's Euro run has me thinking about historical extreme snowfalls in my area. Not sure if others have used https://xmacis.rcc-acic.org before, but this is my go-to website for climo stuff. It has hundreds of sites throughout the area, but it can be difficult to find some that have lengthy and/or continuous periods of record.
In any event, I was able to find an observation spot in North Conway that dates back to 1974. Unfortunately, this is about 1000' lower than my location but these are the top 10 snowfalls in the valley since the mid '70s: