Amphibians Active during the day

Cascades Frog

Rana cascadae

iNaturalist Wikipedia

A hardy high-altitude specialist, the Cascades Frog is the iconic amphibian of the Pacific Northwest's subalpine meadows and volcanic peaks.

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0 Habitats

Quick Identification

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Size

1.75 to 3 inches (4.4 to 7.5 cm) snout-to-vent length

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Colors

Olive-green, tan, or copper-brown back with distinct ragged black spots; belly is typically honey-yellow to cream

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Key Features

Distinctive black spots with ragged or irregular edges
Honey-yellow or cream-colored wash on the belly and undersides of legs
Well-defined ridges (dorsolateral folds) running down the sides of the back
Golden eyes with horizontal pupils

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 10 AM - 4 PM

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Season June-September

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Diet Adults are opportunistic predators that eat a variety of invertebrates including beetles, flies, spiders, and dragonflies. They also occasionally consume the larvae of other amphibians.

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Habitat Subalpine meadows, mountain bogs, and the margins of high-elevation lakes and slow-moving streams.

public Geographic range

Where Does the Cascades Frog Live?

Native to the Pacific Northwest of North America, the Cascades Frog is a regional specialist found almost exclusively in high-altitude corridors. Its range follows the volcanic spine of the Cascade Mountains from northern Washington through Oregon and into the Lassen Peak region of Northern California, with a separate disjunct population inhabiting the Olympic Mountains of Washington. This species is a true mountain resident, rarely venturing into the lowlands or far from the alpine snowmelt that feeds its habitat.

Basemap © OpenStreetMap contributors

1 Countries

48,000 km² Range

Near Threatened Conservation

US United States

Elevation range

0 m1,000 m2,000 m4,000 m

750 m – 2,500 m

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iNaturalist / Verified observation data

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Behavior

The Cascades Frog is a specialized mountain dweller that has adapted to the short, intense growing seasons of the Pacific Northwest's high elevations. Unlike many lowland frogs that are strictly nocturnal to avoid heat, these frogs are primarily diurnal. They spend a significant portion of their day basking on sun-warmed rocks or logs near the edges of snow-melt pools and subalpine meadows, using the sun's energy to regulate their metabolism.

These frogs are highly site-faithful, often returning to the same breeding ponds year after year as soon as the ice begins to thaw. They are excellent jumpers and are quite wary; at the slightest vibration or shadow, they will leap into deeper water and hide in the bottom silt. During the long winter months, they hibernate in the saturated mud of pond bottoms or in spring-fed subterranean cavities where the water does not freeze solid.

photo_camera EverydayEarth exclusive

Camera Tips

Capturing the Cascades Frog on a trail camera requires finding 'relic' water—small pools or pond margins that remain wet through the heat of August. Position your camera very low to the ground, ideally 6 to 10 inches high, and angle it slightly downward toward a flat, sun-exposed rock or a half-submerged log. These are the preferred basking spots where frogs will sit motionless for hours, providing excellent opportunities for clear, high-resolution triggers.

Since these frogs are small and their movement can be subtle, use a camera with a high-sensitivity PIR (Passive Infrared) sensor and set it to take photo bursts or short 10-second videos. Because they are diurnal, you don't need to worry about heavy flash use, which can sometimes wash out their intricate spot patterns. Instead, look for locations with 'dappled' sunlight where the frog's olive-green skin will naturally contrast against the grey mountain stone.

Avoid placing cameras in fast-moving water; instead, focus on the quiet, silty 'bays' of subalpine lakes. If you are using an AI-powered camera like those from EverydayEarth, ensure the focal range is set for close-up subjects, as a frog sitting 3 feet away may appear too small for reliable identification. The best time to deploy cameras is mid-summer, just after the heavy snowpack has retreated and the meadows are in full bloom.

Similar Species

Species that look similar or are commonly confused with Cascades Frog.

Oregon Spotted Frog

Has a reddish-orange underside and eyes that are angled more upward than the Cascades Frog.

Columbia Spotted Frog

Typically has a redder belly and is found further inland toward the Rocky Mountains.

American Bullfrog

Much larger (up to 8 inches), lacks the ragged spots, and has a massive, circular eardrum (tympanum).

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Frequently Asked Questions

Cascades Frogs are primarily active during the day (diurnal). They are most frequently seen between mid-morning and late afternoon when the sun is strongest, as they need the warmth to bask and maintain their body temperature.

Unless you live at a high elevation (above 2,500 feet) near the Cascade or Olympic mountains, you likely won't find them in a typical backyard. For those in mountain communities, maintaining a natural, chemical-free pond with native sedges and plenty of sun exposure is key.

Their diet consists mostly of small invertebrates. They hunt for spiders, beetles, dragonflies, and various flying insects that frequent the damp edges of mountain meadows.

No, they are rarely found in suburban or urban environments. They are high-altitude specialists that require pristine mountain habitats, making them much more common in National Parks and Wilderness areas than in developed zones.

The easiest way is the belly color: Cascades Frogs have a yellow or honey-colored belly, while Oregon Spotted Frogs have a reddish or orange underside. Also, Cascades Frogs have more distinct black spots with 'ragged' edges.

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