Bear AttacksAttacks are rare—nobody has been killed or seriously injured by a bear in Yosemite. If a black bear approaches, always follow the above guidelines. If a black bear attacks while you're in Yosemite, fight back.
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Where to See Yosemite Bears. Black bears are scaredy cats. They mainly stay away from humans, but you have a good chance of seeing one in Yosemite National Park among oak trees and meadows. Since they don't like being around humans, black bears live and travel in heavily wooded areas.
Make sure you know before you go. In national parks where grizzlies live, such as Glacier or Grand Teton, rangers encourage you to carry bear spray. In others, such as Yosemite, where only black bears live, bear spray is not even permitted.
If a bear approaches you or if you are in a campground, picnic area, parking lot, lodging area, or other developed area, act immediately to scare it away. Scare the bear away by yelling aggressively and as loudly as possible until the bear leaves.
Global climate change is impacting Yosemite. Worldwide emissions of greenhouse gases trap heat in the atmosphere, leading to rapid warming observed across the western US. Scientists project that average temperatures in the park may rise by 6.7–10.3°F between 2000 and 2100.
However, it's important to know your own abilities and hike within your limits—bringing the right layers, footwear, food and water. Trails at Yosemite range from relatively flat, smooth paths to steep, rocky cliffs with no guardrails. Study the trail maps and plan ahead to keep you and your hiking partners safe.
Mountain lions—also called cougars, pumas or panthers—roam Yosemite's mountains and valleys. These important predators, native to the Americas, are a natural part of the Yosemite landscape.