Alternative Aspen is a term used to describe a variety of activities and locations in the Aspen, Colorado area. POPLAR (6 letters) is a type of tree that is commonly found in the area. Tree (4 letters) is another type of vegetation that can be found in the area. SKI (3 letters) is a popular winter activity that can be enjoyed in the area. Skis (4 letters) are the equipment used for skiing. SLOPE (5 letters) is the terrain used for skiing. Skiing (6 letters) is the act of using skis to travel down a SLOPE.