Rattlesnakes in Open Space

A rattlesnake slithering through dry grass with its head lifted. Photo by Josh Whaley.

Rattlesnake Information for LARPD Visitors

Sycamore Grove Park is home to multiple snake species. Some of the most common snakes seen in the park include the Pacific gopher snake, California king snake, and Western rattlesnake. The only venomous snake in the park that can be dangerous to humans is the rattlesnake. Understanding more about rattlesnakes can help visitors identify a rattlesnake in the wild and take necessary precautions while at Sycamore Grove Park.

The Western rattlesnake (Crotalus oreganus) is widespread throughout California and is made up of 3 subspecies; the subspecies found in our area is known as the northern Pacific rattlesnake (Crotalus oreganus oreganus). Typically, these snakes are dark brown to olive-brown with these colors arranged in a blotchy pattern down their body. Western rattlesnakes usually have a pale-yellow belly. Averaging 3-4 feet long, they have a thick body, and triangular shaped head that is wider than their neck. One of the most identifiable characteristics of the Western rattlesnake is their rattle which the snake will shake when threatened. Young rattlesnakes may not have a rattle yet and cannot make a sound, but they can still bite and inject venom. The Pacific gopher snake can look very similar to the western rattlesnake.

Rattlesnake vs. Gopher Snake: Rattlesnake has rattles, thick body, triangular head; Gopher Snake has pointed tail, slender body and head. — Rattlesnake versus Gopher Snake

What to expect from rattlesnakes in Open Space

They are typically most active from April to October

This doesn’t mean you won’t see a rattlesnake in other months, however, optimal temperatures for rattlesnakes usually occur during this time. It is important to take safety precautions whenever you are in the park.

They like to sunbathe on the paved path or right near the trail

A lot of our rattlesnake sightings are on the paved Arroyo del Valle Regional Trail. Please observe necessary safety precautions if you see a rattlesnake.
If you are biking in the park, please keep an eye out for snakes on the path. No matter what type of snake it is, please do your best to avoid running over snakes.
If you see a rattlesnake in the middle of a trail, give them space when you move past them. Often, rattlesnakes will move on their own.
If a rattlesnake is blocking the path and not moving away on its own, you can call the Rangers at (925) 960- 2400.

Rattlesnakes are not aggressive

They only bite when they feel threatened, and they normally avoid humans.

A rattlesnake coiled on the ground among dry grass, camouflaged. — A dark patterned rattlesnake seen at Brushy Peak. Photo by Sue Griffin.

Tips to Recreate Safely in Rattlesnake Habitat

Stay on designated trails. Rattlesnakes are very good at camouflaging, especially when they are in long grass. Staying on the trail prevents you from accidentally stepping too close to a rattlesnake.
Keep dogs on a leash.
Keep your distance from a rattlesnake. If they have space, they are less likely to feel threatened.
Do not attempt to pick up a rattlesnake. Even a deceased rattlesnake can inject venom.

What to do if You Are Bit by a Rattlesnake

Stay calm and do not run.
Call 911/ seek medical attention immediately.
Keep the bite area lower than the heart, if possible.
DO NOT attempt to suck out the venom.
DO NOT use a tourniquet.