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.
A movement around the U.S. encourages people to skip the shopping malls Friday and spend time in nature. Some national parks and state parks in California are waiving entry fees.
The 19th annual Lodi Sandhill Crane Festival this weekend is expected to bring thousands of visitors to see the stately birds.
The Pacific Storm system brought some slight improvement to drought conditions in California and Nevada last week.
The U.S. Environmental Protection Agency is providing more than $30 million to California and Nevada native tribes for water quality and environmental restoration projects.
A program will begin soon in the Eldorado National Forest to remove live or dead vegetation to prevent the spread of wildfires.