Cascades Frog

October 23, 2015
Heidi Rockney and Karen Wu
Cascades Frog

Cascades Frog Photo: Dennis Paulson

Name: Cascades Frog (Rana cascadae)
Order: Frogs (Anura)
Family: True Frogs (Ranidae)

What they look like

  • 4-7.6cm
  • Brownish or green with black spots on their backs and yellow on underside
  • Have small bumps on their back and sides
  • Have a dark ‘mask’ with a white jaw line stripe that goes all the way to their shoulders.

Where they live

  • View a map of where they live
  • In Washington state found in Cascade and Olympic Mountains
  • Prefer quiet water sources including ponds, lakes, marshes or slow moving streams at low elevations
  • Stay near the water, except for humid, wet nights can be found in mud or thick vegetation away from water


  • Breeding season is March-August, as soon as water sources are thawed out
  • Eggs are bicolored, black on top and white on bottom
  • Eggs are found near shore and are clumped together unattached to anything
  • Will not breed in water sources that contain predatory fish

Cool Biology Facts

  • Hibernate during winter and have been found buried in mud under up to one foot of water
  • When startled will quickly leap into water and dive head first into the substrate
  • Skin secretes antimicrobial substance to protect against unwanted infections or pests


Distribution Map

Map of Cascades Frog distribution in Washington state. Learn more on the NatureMapping Foundation website.

Explore more of the Amphibians & Reptiles of Washington or check out All About Amphibians.

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