Frogs in Colorado in September
Yes, September is a good month to see frogs in Colorado. It is the 5th busiest month of the year, with 1,323 of the 12,635 sightings logged across the year (10.5%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Good month for frogs in Colorado
10.5%
of yearly sightings
1,323
records in September
#5
busiest month of 12
12,635
verified records a year
August 18.5%, September 10.5%, October 1.8%. Busiest month is July at 27.7%.
12,635 verified observations of frogs in Colorado, recorded across 12 months of the year on iNaturalist.
When frogs are recorded in Colorado
Peak month
July
3,495 records (27.7% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 43 | 0.3% |
| February | 14 | 0.1% |
| March | 127 | 1% |
| April | 722 | 5.7% |
| May | 1,755 | 13.9% |
| Junepeak | 2,542 | 20.1% |
| Julypeak | 3,495 | 27.7% |
| Augustpeak | 2,337 | 18.5% |
| September | 1,323 | 10.5% |
| October | 225 | 1.8% |
| November | 37 | 0.3% |
| December | 15 | 0.1% |
Frogs you are most likely to see
| Species | Verified observations |
|---|---|
| Woodhouse's Toad | 5,687 |
| American Bullfrog | 2,290 |
| Boreal Chorus Frog | 1,358 |
| Northern Leopard Frog | 809 |
| Couch's Spadefoot | 423 |
| Mexican Spadefoot | 388 |
| Plains Spadefoot | 385 |
| Plains Leopard Frog | 277 |
In Colorado, September carries 10.5% of the year's frogs sightings, about 2.2 points above an even month-to-month split. That makes it the 5th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from August (18.5%) into September, and it heads toward October (1.8%) after. The busiest month is July (27.7%), so if timing is flexible, that window is the safer bet.
The frogs most often recorded in Colorado are Woodhouse's Toad, American Bullfrog and Boreal Chorus Frog. Those counts are annual totals rather than a September split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in September itself.
Which frogs you are most likely to see
- Woodhouse's Toad5,687 records
- American Bullfrog2,290 records
- Boreal Chorus Frog1,358 records
- Northern Leopard Frog809 records
- Couch's Spadefoot423 records
- Mexican Spadefoot388 records
Plan your frog trip in Colorado
Start with live tours near Bent's Old Fort National Historic Site, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
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Use the live GetYourGuide widget to compare local departures and activity styles close to the main frog viewing area.
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Gear to see them
Frequently asked questions
Can you see frogs in Colorado in September?+
Yes. September accounts for 1,323 of the 12,635 verified frogs sightings logged in Colorado across the year, which is 10.5% of the annual total.
Is September a good time to see frogs in Colorado?+
September is the 5th busiest month. It is workable, though July and June is the stronger window for a reliable sighting.
What month is best for frogs in Colorado?+
July is the single busiest month, with the broader peak running through July, June and August, based on 12,635 verified observations.
Which frogs are you most likely to see in Colorado?+
The most-recorded species in Colorado are Woodhouse's Toad, American Bullfrog and Boreal Chorus Frog, based on all-time iNaturalist counts.
See frogs in Colorado in other months
More wildlife in Colorado