Islais Creek or Islais Creek Channel (previously known as Du Vrees Creek, Islais Channel and Islais Swamp) is a small creek in San Francisco, California. The name of the creek is derived from a Salinan Native American word "slay" or "islay", the name for the Prunus ilicifolia wild cherries.Around the time of the Gold Rush, the area became an industrial hub, and the condition of the creek worsened.