Yosemite National Park is open 24 hours per day, 365 days per year. In 2020 reservations are required to visit. However, the Hetch Hetchy Entrance Station is open only during daylight hours (approximately) and some roads are closed due to snow from around November through May or June. (Check road conditions and Hetch Hetchy hours.) Half Dome seen from Ahwahnee Meadow on a winter afternoon.
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