• Wizard Island

    Crater Lake

    National Park Oregon

Bull Trout - Salvelinus confluentus

Drawing of a Bull Trout

Drawing of a Bull Trout, Salvelinus confluentus.

  • Watch this Oregon Field Guide episode for an excellent introduction into the Bull Trout problems at Crater Lake National Park:
  • Sun Creek, a headwater stream in Crater Lake National Park, contains a population of Endangered Species Act listed, native Bull Trout (Salvelinus confluentus) recovering from decades of competition with nonnative Brook Trout (S. fontinalis).
  • The National Park Service (NPS) eradicated Brook Trout from upper Sun Creek during the early 2000s.
  • Bull trout have gradually expanded to occupy vacant habitat in the stream, but many areas that once contained high densities of Brook Trout remain only sparsely populated by Bull Trout.
  • Current management actions will eradicate nonnative trout from the lower portion of the Sun Creek watershed and create additional vacant habitat for Bull Trout.

Did You Know?

Did You Know?

William Gladstone Steel worked for 17 years to convince Congress that a national park should be created to protect Crater Lake. He finally succeeded and the park was authorized on May 22, 1902.