• Wizard Island

    Crater Lake

    National Park Oregon

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  • Vehicle-Free Days on East Rim Drive

    The park will host two vehicle-free days on East Rim Drive, September 20 and 27, 2014. Although East Rim Drive will be closed for these events, all other roads through the park will remain open to vehicular traffic. More »

  • Lost Creek Campground CLOSED Nights of 9/19 and 9/26

    Lost Creek Campground will be CLOSED from 3:00 PM Friday, 9/19 until 5:00 PM Saturday, 9/20 because of the temporary road closure to vehicles on East Rim Drive. It will also be CLOSED from 3:00 PM Friday, 9/26 until 5:00 PM Saturday, 9/27.

  • Stage 1 Fire Restrictions in Effect

    To ensure public safety and to provide the highest degree of protection to park resources, restrictions on campfires, smoking, and fireworks are in effect. More »

The non-native Crayfish in Crater Lake

The Signal Crayfish of Crater Lake

A Signal Crayfish from Crater Lake.


  • The Signal Crayfish (Pacifastacus leniusculus klamathensis) was introduced by humans into Crater Lake in 1914.
  • The signal crayfish is a common crayfish in southern Oregon.
  • Introduced crayfish have proven to be very destructive to ecosystems in both streams and lakes around the world.

Park biologists are concerned about the Signal Crayfish affects in Crater Lake so they are studying:

  • Locations of crayfish in Crater Lake,
  • Crayfish behavior during encounters with Mazama Newts,
  • Crayfish effects on newts, insects, and algae in Crater Lake,
  • Whether crayfish will eradicate all the Mazama Newts in Crater Lake,
  • Methods to reduce, or remove, crayfish from Crater Lake.
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Did You Know?

Did You Know?

At 1,943 feet deep, Crater Lake is the deepest lake in the United States and one of the ten deepest lakes in the world!