• Wizard Island

    Crater Lake

    National Park Oregon

There are park alerts in effect.
show Alerts »
  • 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 »

How are crayfish affecting Crater Lake

In Crater Lake, introduced non-native crayfish appear to be displacing a unique, locally-adapted population of native salamanders that occur nowhere else in the world.

Rough-skinned newts (Taricha granulosa) within the Crater Lake caldera have been proposed as an endemic subspecies, the Mazama newt (T. granulosa mazamae), and preliminary genetic analyses affirm that the population is distinct and isolated from related newts outside the caldera.

Signal crayfish (Pacifastacus leniusculus) were introduced into Crater Lake around 1914 and have since expanded to fill over half of shoreline habitat in the lake.

Observational evidence collected by park scientists suggests that the invasive crayfish are continuing to expand and have reduced the distribution of endemic newts. Newts remain in areas that crayfish have not yet invaded, but are almost entirely absent from areas occupied by crayfish.

Introduced crayfish in other systems have been documented to cause rapid declines in abundance of native salamanders.

If no action is taken at Crater Lake, crayfish ultimately may cause extinction of the unique Mazama newt.

Did You Know?

Did You Know?

The "Old Man" of Crater Lake is a mountain hemlock log that has been floating upright in the lake for more than 100 years! Wind currents enable the Old Man to travel to different locations around the lake.