Atigun Pass South is located in Alaska. It is 2991.3 meters long with an average gradient of 11.8% and a maximum gradient of 28.4%. Find similar hills.
Some day, I'd really like to ride the Haul Road (aka the Dalton Highway) from Fairbanks up to Deadhorse on the Arctic Ocean. When I do, this looks to be the craziest climb on the route, especially given that it's unpaved. The Northern side doesn't seem to be anywhere near as difficult.