The park has three entrances in the west, ca-120, ca-140 and ca-41 from north to south, and only one entrance to the East: ca-120 (road closed in winter). Ca-120 is one of the few major transportation routes across the Nevada Mountains in summer. To the north, you have to go to I-80 north of Lake Tahoe and go south to ca-58 in Southern California. In the west of the park, ca-120 turns around the mountain, and there is a fork road to the Hetch-Hetchy reservoir; in the east of the park, ca-120 crosses the trestle road of Lee's Canyon, which is very steep and can be called a pioneering project.
Ca-140 is the lowest elevation of the three roads along the Merced River, so this is the best way to visit the National Park in winter. Along the Merced River, Yosemite canyon is V-shaped at first and has many bends. Suddenly, the view is wide and bright, and the canyon becomes wide and becomes U-shaped, which marks the end of the glacier tongue in the past: the V-shaped Canyon is a canyon washed out by liquid water, which has not been baptized by glaciers, while the U-shaped Canyon is transformed by glaciers.
Ca-41 leads to Fresno city. This is the only way to get back and forth between Yosemite National Park and redwood and King's Canyon National Park.
Yosemite National Park is about 4 hours' drive from San Francisco Airport.