Sierra (Jackson) Giesler (born August 1992) is a sprint car racer from Middleton, Idaho. Giesler began dirt track kart racing at the age of six, graduating to asphalt sprint car racing in 2006 and briefly racing late model stock cars in 2007. She has had wins at racetracks throughout the Northwestern United States and in Canada. Giesler holds sprint car qualifying speed records at Magic Valley Speedway in Twin Falls, Idaho and on the old track configuration at Meridian Speedway in Meridian, Idaho.