Mountain Day

From Willipedia

Probably the greatest day of the school year. On one of the first three Fridays in October, Morty cancels classes and everyone hikes up to Stony Ledge on Mt. Greylock. Apple cider, donuts, and beautiful views abound.

In addition, there's a morning trek to Stone Hill near the Clark, climbing on Chapin, and an all campus picnic.