Store food properly to prevent bears and other wildlife from obtaining unnatural food.
Do not feed wildlife (including birds) or disturb wildlife by approaching too closely (typically 50 yards).
Avoid damaging live trees and plants; do not pick wildflowers.
Do not plant or transport the seeds of non-native plants in Yosemite. The Division of Resources Management and Science is actively trying to control or eradicate non-native invasive plant species from Yosemite.
Minimize use and impact from fires.
Do not bring firewood from outside the area into the park. This is to protect Yosemite from pathogens, such as Sudden Oak Death, and from the introduction of insect infestations.
Leave natural objects and cultural artifacts for others to enjoy.
Drive the speed limit and pay attention while driving on park roads to reduce the chances of injuring wildlife.