The Toyota US Grand Prix Returns to Aspen Snowmass! Freeskiers and snowboarders from across the globe will return to the slopes of Buttermilk Mountain to show the world what they’ve got in numerous disciplines. The competition will take place at Buttermilk, a mountain known for one of the most iconic terrain parks in the world, where athletes push the limits of what’s possible in freestyle skiing and snowboarding. The mountain also is perfect for spectators as the mountain’s numerous venues are just a short walk from the resort’s parking lot and feature elevated and on the snow viewing areas.