What is it? Red Bull 400 is series of 14 leg-burning, lung-busting events located in off-season ski resorts in Europe, Asia and North America, where contestants race each other up a 400m ski jump. With a gradient of around 37 percent, the course is short, but it’s not pretty (besides the stunning view from the top). As Red Bull put it, it’s 400m of total uphill struggle.