State herp calendar
Reptiles and Amphibians of Utah
Utah has red-rock desert, the Great Basin and tall mountains. Lizards rule here. Common Side-blotched Lizards and Plateau Fence Lizards are the most-reported herps. August is the busiest month, and the Western Rattlesnake is the only venomous snake on the list.
42 species4 ecoregions1 venomous
Search entire stateSpecies out across Utah, by group and month
| Group | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snakes | 1 | 6 | 12 | 12 | 12 | 11 | 11 | 10 | 7 | 4 | ||
| Lizards | 2 | 13 | 17 | 17 | 18 | 15 | 17 | 17 | 14 | 4 | 1 | |
| Turtles | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | ||
| Frogs and Toads | 6 | 8 | 8 | 7 | 7 | 8 | 8 | 6 | 2 | |||
| Salamanders | 1 | 1 | 1 | 1 | 1 | 1 |
Numbers = species active that month (at peak or just starting / winding down).
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Hi, I'm Nick. I built Herp Calendar on my own and I keep it free, with no ads. If it has helped you find a herp this season, a small tip goes straight into the hosting and the data work. Only if you can spare it. Either way, I'm glad you're here.
Pick your ecoregion
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Tap a region to see what's out
Ecoregions of Utah
Seasons shift a lot between Utah's ecoregions. Pick the one nearest you for a 12-month calendar of what's out.
Wasatch and Uinta Mountains
9 speciesHigh Utah mountains with sagebrush lizards and garter snakes.
View calendar →Colorado Plateau
34 speciesRed-rock canyon country with fence lizards, collared lizards and gopher snakes.
View calendar →Great Basin
28 speciesSagebrush desert where lizards rule and rattlesnakes den in the rocks.
View calendar →Mojave Desert
39 speciesCreosote desert where chuckwallas, horned lizards and several rattlesnakes live.
View calendar →Venomous here: Western Rattlesnake. Don't handle any snake you can't identify.
About Utah
When are reptiles and amphibians most active in Utah?
August is the busiest month in Utah, with 36 species at peak activity. At least half of the area's species are active from March through October.
What reptiles and amphibians live in Utah?
42 species have enough iNaturalist records to show here: 18 lizards, 13 snakes, 8 frogs and toads, 2 turtles, and 1 salamander. The most-reported are the Common Side-blotched Lizard, Plateau Fence Lizard, and Common Sagebrush Lizard.
Are there venomous snakes in Utah?
Yes. The Western Rattlesnake lives here. Don't handle them.
Which reptiles and amphibians in Utah are introduced?
The American Bullfrog, Pond Slider, and New Mexico Whiptail are 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.