Aatsista-Mahkan or Running Rabbit (c. 1833 – probably January 24, 1911) was a leader of the Siksika First Nation. He was the son of Akamukai (Many Swans), leader of the Biters band, and after his father's death in 1871, Aatsista-Mahkan took over the leadership of the band. He was known for his generosity and kindness, and for his loyal protection of his family. In 1877 he was a signatory to Treaty 7, but he and his people continued to track the bison until 1881, when he and his people were assig