Apau Koyan Festival was previously known as the Bakun Festival or Asap Festival, synonymous with the name of this area, namely the small district of Sungai Asap. The Apau Koyan Festival is held biennially alternately with the Belaga Regatta Festival. Among the activities held are traditional games competitions, cultural events (sape music, Orang Ulu Asli dance, and traditional songs according to ethnic groups), folk sports/games (Payu/Gusti Orang Ulu, blowpipe shooting, spinning tops and others).