Yup! at Mammoth Mountain Share this article Yup! One of the members of our team, Mitch Delaney, took the Yup! up to Mammoth Mountain this past weekend for opening weekend and had the best experience on it! Peep his quick little edit🔥 Couple rusty shenanigans from yesterday on the new @signalsnowboard YUP. Mammoth is finally back open 🤤🖤❄️ @marc_wierenga 🎥 🎶exit order A post shared by Mitch Delaney (@courage_craft) on Nov 13, 2017 at 9:21am PST