The National Park Service says all areas that had previously been closed, including the Tuolumne Grove of Giant Sequoias, and hiking trails around the Hetch Hetchy reservoir, are again open to the public.
The reopening comes with cautions. Visitors are urged to be aware of risks, which include hazardous trees and potential rock falls.
Fire restrictions that had been imposed last summer and fall have been lifted. But the continuing drought could cause those restrictions to be restored later in the year.
The Rim Fire started in mid-August. It burned about 77,000 acres within Yosemite, and total of 255,000 acres.
About 9 in 10 of the produce tested for pesticides at California grocery stores, farmer's markets and other outlets had little or no residue, according to the state Department of Pesticide Regulation's 2016 survey.
Gov. Brown attended the first UN Climate Conference held since President Donald Trump said he will withdraw from the Paris Climate Accord.
A year after California enacted a statewide ban on single-use plastic bags, environmental groups say early data show a significant dip in plastic trash.
A collection of environmental, fishing and whitewater groups recommends changes to dam management in a new report, issued in response to the failure of the main spillway at Lake Oroville in February.
Traditional methods to cool cows use 11,000 gallons of water per cow per year. UC Davis researchers are trying out new techniques that use less resources.