page_title: Cascades frog
section_title: Reproduction
hierarchical_section_title: Cascades frog / Behavior / Reproduction
caption_attribution_description: Rana cascadae English: Cascades Frog larvae
context_page_description: The Cascades frog is a species of frog in the family Ranidae found in the Pacific Northwest, mainly in the Cascade Range and Olympic Mountains.
context_section_description: Cascades frogs lay their eggs May 20 through July 10, depending on when the snow melts and creates ponds in which the eggs are laid. First, egg masses are deposited in comparatively warm water along gradually sloping shorelines, often over soft substrates protected from severe wave action. Females can only breed once a year, but whether they skip years remains unknown. A single female will lay up to 425 eggs at a time, but very few tadpoles will live past their first year. The placement of clusters of egg masses in shallow water soon after the first thaw can make them susceptible to freezing and pathogen transmission between clusters. The eggs hatch within eight to 20 days. Their larval period lasts 80 to 95 days. Most frogs  reach their full size after three years, after which they become fertile and can begin mating. Adults appear to use the same breeding sites for several years.
caption: Larvae metamorphose in two to three months (Alpine Lakes Wilderness)
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