Rubber Boa

A dark-colored snake coiled on a graveled flat surface.
The rubber boa is one of six reptile species and the largest species found in the park.
A dark-colored snake coiled on twigs and grass

Similar species:

The racer (Coluber constrictor) can be found from southern British Columbia, east to Maine, and south across the US to southern Florida and southern California. Racers, as their name implies, are fast and sleek snakes, unlike the slow-moving rubber boa. Racers also have larger eyes than rubber boas and round pupils. Any sightings of this species should be reported to resource managers.

A white and tan striped snake with black dots on a rock

Terrestrial Gartersnake

Terrestrial gartersnakes are the most common reptile in Yellowstone.

A tan and black snake on a rocky surface


Bullsnakes are often mistaken for rattlesnakes because of their appearance and behavior.

A tan and brown spotted snake with rattler in a coil

Prairie Rattlesnake

Prairie rattlesnakes are the only dangerously venomous snakes in Yellowstone.

A dark gray, tan, and white striped lizard with small spikes on gravel

Sagebrush Lizard

The sagebrush lizard is the only lizard in Yellowstone.

A black, white & red snake on a rock surface

Common Gartersnake

Common gartersnakes are only found in southern parts of the park.

The head of a brown spotted snake among grass


There are six reptile species in Yellowstone.

Last updated: July 21, 2020

Park footer

Contact Info

Mailing Address:

PO Box 168
Yellowstone National Park , WY 82190-0168



Contact Us

Stay Connected