Travel Rattlesnakes bit two hikers at Yosemite National Park in August. Here’s how you can stay safe. September 15, 2020David Oliver, USA TODAYComments Off on Rattlesnakes bit two hikers at Yosemite National Park in August. Here’s how you can stay safe. If you're planning a trip to Yosemite National Park, it's not just a fire advisory you need to keep in mind: It's also rattlesnakes.