Frogs in Colorado: identification guide and best places to start

Yes, frogs are found across Colorado, from the Front Range wetlands to the San Luis Valley. Start your search in shallow ponds, slow streams, and marshes after spring rains. Focus on calls at dusk for the best chance of a sighting.

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By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.

Wood Frog photographed in Colorado

Wood FrogPublic domain CC0

Boreal Toad photographed in Colorado

Boreal ToadPublic domain CC0

Wood Frog photographed in Colorado

Wood FrogAnders Hastings CC BY

Photos by iNaturalist observers, reused under the licence each observer chose.
Peak season right now
8
species recorded
July, June, August
peak months

Verified species, source iNaturalist

16 types of frogs recorded in Colorado

16 frog species have a verified observation record in Colorado, each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.

  • Woodhouse's Toad (Anaxyrus woodhousii), a species recorded in Colorado1

    Woodhouse's Toad

    Anaxyrus woodhousii

    5,786 recordsNative

    Shalana Gray CC BY

    Wikipedia
  • American Bullfrog (Lithobates catesbeianus), a species recorded in Colorado2

    American Bullfrog

    Lithobates catesbeianus

    2,331 recordsNative

    Nell Cant CC BY

    Wikipedia
  • Boreal Chorus Frog (Pseudacris maculata), a species recorded in Colorado3

    Boreal Chorus Frog

    Pseudacris maculata

    1,371 recordsNative

    James Telford CC BY

    Wikipedia
  • Northern Leopard Frog (Lithobates pipiens), a species recorded in Colorado4

    Northern Leopard Frog

    Lithobates pipiens

    832 recordsNative

    Liz Smith CC BY

    Wikipedia
  • Couch's Spadefoot (Scaphiopus couchii), a species recorded in Colorado5

    Couch's Spadefoot

    Scaphiopus couchii

    432 recordsNative

    Ken-ichi Ueda CC BY

    Wikipedia
  • Plains Spadefoot (Spea bombifrons), a species recorded in Colorado6

    Plains Spadefoot

    Spea bombifrons

    394 recordsNative

    Mike Duran CC BY

    Wikipedia
  • Mexican Spadefoot (Spea multiplicata), a species recorded in Colorado7

    Mexican Spadefoot

    Spea multiplicata

    393 recordsNative

    Public domain CC0

    Wikipedia
  • Plains Leopard Frog (Lithobates blairi), a species recorded in Colorado8

    Plains Leopard Frog

    Lithobates blairi

    279 recordsNative

    Public domain CC0

    Wikipedia
  • Great Plains Toad (Anaxyrus cognatus), a species recorded in Colorado9

    Great Plains Toad

    Anaxyrus cognatus

    238 recordsNative
  • Chihuahuan Green Toad (Anaxyrus debilis), a species recorded in Colorado10

    Chihuahuan Green Toad

    Anaxyrus debilis

    151 recordsNative

    crseaquist CC BY

    Wikipedia
  • Red-spotted Toad (Anaxyrus punctatus), a species recorded in Colorado11

    Red-spotted Toad

    Anaxyrus punctatus

    142 recordsNative

    Nathan May CC BY

    Wikipedia
  • Western Toad (Anaxyrus boreas), a species recorded in Colorado12

    Western Toad

    Anaxyrus boreas

    54 recordsNative

    Public domain CC0

    Wikipedia

Also recorded in Colorado

#SpeciesRecords
13Canyon Tree FrogNativeDryophytes arenicolor45
14Great Basin SpadefootNativeSpea intermontana24
15Western Narrow-mouthed ToadNativeGastrophryne olivacea19
16Wood FrogNativeLithobates sylvaticus12

Plus 6 more recorded only rarely (fewer than 10 verified sightings). Counts from verified iNaturalist observations. Photos by iNaturalist observers, reused under the licence each observer chose.

Real sighting data, source iNaturalist

12,635 verified observations on iNaturalist of frog have been recorded in Colorado, most often in July, June, August.

When frog are recorded in Colorado

Yes, frogs are found across Colorado, from the Front Range wetlands to the San Luis Valley. Start your search in shallow ponds, slow streams, and marshes after spring rains. Focus on calls at dusk for the best chance of a sighting.

1. Where are people most likely to notice frogs in Colorado?

Your best odds are in and around still or slow-moving water below 8,000 feet. Look for frogs at the edges of ponds, marshes, irrigation ditches, and beaver ponds. The Front Range, from Colorado Springs to Fort Collins, holds strong populations. I鈥檝e had great luck at Walden Ponds in Boulder and the wetlands of Barr Lake State Park.

2. What season or weather patterns help with frog spotting?

Spring is prime time. Once daytime temps hit the 60s and evening lows stay above 40掳F, frogs become active. Heavy spring rains trigger mass breeding events. Warm, damp evenings from March through June produce the most frog activity. On a misty May evening, frogs often call by the dozens.

See ourFrogs guidefor the next step.

3. Simple ID cues that separate Colorado frogs from lookalikes

Colorado鈥檚 true frogs have smooth, moist skin and long legs built for jumping. They usually have two prominent dorsolateral ridges running down their backs. Toads have warty, dry skin and shorter legs. Tiger salamanders, sometimes mistaken for frogs, have distinct spots and a tail. If it鈥檚 hopping and has webbed feet, it鈥檚 a frog.

See ourstate animal guidefor the next step.

4. What are the most common frog species in Colorado?

The Northern Leopard Frog is widespread, green or brown with round spots. The Boreal Chorus Frog is tiny (1 inch) with three dark stripes. The Wood Frog lives in mountain wetlands and has a dark mask. The Plains Leopard Frog looks similar to the Northern but has a pointed snout. Learn their calls to separate them.

5. Where are the best spots to find frogs in Colorado?

Try the wetlands at Barr Lake State Park, the South Platte River near Denver, or the San Luis Valley鈥檚 extensive marshes. For a mountain experience, hike to beaver ponds in the Roosevelt National Forest. Many front range open spaces, like Boulder鈥檚 Sawhill Ponds, are reliable year after year.

6. How can you identify a frog by its call?

Each species has a distinct breeding call. The Boreal Chorus Frog sounds like a thumbnail run across a comb. The Northern Leopard Frog makes a low snore followed by grunts. The Wood Frog鈥檚 call is a short, duck-like quack. Spend a spring evening sitting quietly near water and you鈥檒l quickly tell them apart.

7. What frog-themed art and gifts does Easy Street Markets offer?

Red Eyed Tree Frog Limited-Edition Print

This vivid print captures the iconic red eyed tree frog, perfect for bringing a pop of tropical color to your wall.Check Price and Availability

Pine Barrens Tree Frog Limited-Edition Print

A detailed illustration of a rare amphibian, ideal for anyone who loves the understated beauty of tree frogs.Check Price and Availability

Wall art print: Frog by Eimear Maguire on Artfully Walls

A playful, illustrative piece that fits any creative space, available framed or unframed.Check Price and Availability

iCanvas Frog Green Wall Art by Jo Lynch

A modern, minimalist frog print in calming greens, ready to hang in a study or living room.Check Price and Availability

For more options, consider ourfrog-themed t-shirtsor browse allColorado wildlife gear.

8. Frequently asked questions about frogs in Colorado

**Are there poisonous frogs in Colorado?** No native frog in Colorado is poisonous to humans. Some toads like the Great Plains Toad produce mild toxins, but they are not dangerous unless ingested.

**When do Colorado frogs hibernate?** Most frog species begin brumation (cold weather dormancy) by October, emerging again in March or April when conditions warm.

**Can I raise Colorado frog tadpoles at home?** It is not recommended. Native frogs play a role in local ecosystems, and raising them requires proper permits. Enjoy them in the wild instead.

**What is the largest frog in Colorado?** The American Bullfrog, an introduced species, can reach 8 inches in body length. It is most common in warm, low elevation ponds and lakes.

**Do frogs in Colorado need water to survive?** Yes. All Colorado frogs require moist habitats for breeding and to keep their skin hydrated. They are most active near water sources.

See ourtour planning ideasfor the next step.

Gear and field guides

Plan your trip

Best time to see frog in Colorado: July, June, August

See the month-by-month sighting calendar.

When to go

Plan your frog sighting in Colorado

Where to look in Colorado

Planning a trip to see frog? Find places to stay near Bent's Old Fort National Historic Site on Booking.com.

Frequently asked questions

What frog species live in Colorado?+

Your best odds are in and around still or slow-moving water below 8,000 feet. Look for frogs at the edges of ponds, marshes, irrigation ditches, and beaver ponds. The Front Range, from Colorado Springs to Fort Collins, holds strong populations. I鈥檝e had great luck at Walden Ponds in Boulder and the wetlands of Barr Lake State Park.

Where can you see frogs in Colorado?+

Your best odds are in and around still or slow-moving water below 8,000 feet. Look for frogs at the edges of ponds, marshes, irrigation ditches, and beaver ponds. The Front Range, from Colorado Springs to Fort Collins, holds strong populations. I鈥檝e had great luck at Walden Ponds in Boulder and the wetlands of Barr Lake State Park.

When is the best time to see frogs in Colorado?+

Your best odds are in and around still or slow-moving water below 8,000 feet. Look for frogs at the edges of ponds, marshes, irrigation ditches, and beaver ponds. The Front Range, from Colorado Springs to Fort Collins, holds strong populations. I鈥檝e had great luck at Walden Ponds in Boulder and the wetlands of Barr Lake State Park.