Stronger, more stable, and built to withstand the harshest of conditions, the Big Agnes Mad House 8, 4-season, 8-person tent offers much more than standard mountaineering tents. They are the Everest base camp dining rooms, buttoned up Black Rock City roosts, and Vedauwoo wind refuges. The Mad House series is our biggest mountaineering design. Try one as an all-season, two-room condo with plenty of space to stretch out and relax on acclimation days, or as a place to serve pancakes to the entire summit team.