In terms of skiing, Northern Arizona and Fort Lewis immediately come to mind :).
Instate, WWU would be great for his academic interests.
UMontana would combine strong Writing/English with skiing.
Sonoma State, a more residential CSU, would be a great academic match for its Hutchins program:
https://hutchins.sonoma.edu/
For an English major, AP Stats (or just Statistics but it’d mean taking College Stats later on rather than being done in one go) would be more important than Precalc.
If he’s interested in Medieval History (I assume of Europe but could be other regions?) look into study abroad opportunities - ideally, one in Britain or Ireland early on, and one in another European country where he speaks the language and will become proficient as a junior or senior.