06/04/2026
Yosemite National Park is home to only one rattlesnake– the northern Pacific rattlesnake (Crotalus oreganus). Their venomous bite is used to capture prey, which helps control the park’s rodent populations. But this bite can also be used on humans if a snake is agitated or startled.
There have been three fatal snake bites in California so far this year. There have also been numerous sightings in the park recently, including the snake in the picture above . These reptiles are an important part of Yosemite's ecosystem, but we need to take precautions to protect ourselves, our loved ones, and our pets:
🐍When hiking, wear protective clothing like high boots and heavy pants. Walk or hike in areas where the ground is clear, so you can see where you step or reach with your hands.
🐍Watch where you step and never put your hands in areas where you cannot see. Brush, ledges, cracks, or holes are common areas where rattlesnakes can be found resting.
🐍If you hear a rattlesnake, stay still until you’ve located the snake visually then move away. Don’t rely on hearing a rattle- some snakes might not rattle even when startled.
There are several things you should NOT do if bitten by a snake:
🚫 DON'T apply a tourniquet
🚫 DON'T pack the bite area in ice or ice water
🚫 DON'T cut the wound with a knife or razor
🚫 DON'T suck out the venom by mouth as infection can occur
🚫 DON'T let the victim drink alcohol
🚫 DON’T attack or kill the rattlesnake for using its natural defense mechanism
All rattlesnake bites are a medical emergency. If you or someone you see is bitten, immobilize and gently wash the bite area with soap and water and apply a cold, wet cloth over the bite if possible. Mark the area of the swelling with a pen and the time and keep the bite at the same level as the heart. Remove anything that might constrict swelling. Most importantly, call 911 or transport to the nearest emergency facility for further treatment and for antivenin to be administered.