Ecoregion
Northern Rockies Reptiles and Amphibians by Month
Mountain forest and river valleys make up the Northern Rockies. Western Terrestrial Garter Snakes are the most-reported herp. Columbia Spotted Frogs and Long-toed Salamanders live around ponds and wet meadows. May is the busiest month. The Western Rattlesnake reaches the warm, low canyons.
14 species1 venomous
Peak and shoulder ratings are rough guidance, not a schedule. Weather, elevation and the year can shift any species by weeks.
Rare and protected species are left off on purpose. Look, don't take, and never handle a venomous snake.
Species out in Northern Rockies, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 5 | 6 | 6 | 6 | 6 | 5 | 3 | ||||
| Lizards | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 1 | ||||
| Turtles | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||
| Frogs and Toads | 1 | 2 | 3 | 3 | 3 | 3 | 3 | 2 | ||||
| Salamanders | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Numbers = species active that month (at peak or just starting / winding down).
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13 species at peak or shoulder in September
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shoulderAbout Northern Rockies
When are reptiles and amphibians most active in the Northern Rockies?
May is the busiest month in the Northern Rockies, with 13 species at peak activity. At least half of the area's species are active from April through October.
What reptiles and amphibians live in the Northern Rockies?
14 species have enough iNaturalist records to show here: 6 snakes, 3 frogs and toads, 3 lizards, 1 turtle, and 1 salamander. The most-reported are the Western Terrestrial Garter Snake, Columbia Spotted Frog, and Pacific Chorus Frog.
Are there venomous snakes in the Northern Rockies?
Yes. The Western Rattlesnake lives here. Don't handle them.
Which reptiles and amphibians in the Northern Rockies are introduced?
The American Bullfrog is not native here.
Where does this data come from?
Activity calendars are built from iNaturalist research-grade observations (downloaded through GBIF, September 2026), corrected for how many people are out observing each month. Rare and protected species are left off on purpose.