The Appal Jam Terrain Park is open. This means that both of Appalachian's parks are open, so, dull your edges, get out your helmet, and hit the rails and hips. This is the earliest date that the resort has opened both of its parks. Appal Jam, known for its Stairset feature, also includes a 30-foot tabletop, hip, 20-foot rainbow box, 16-foot flat box, and a 20-foot C-box. Now, skiers and riders have a choice of 13 features between the two parks.