Maximum length for recreational vehicles is 35 feet. The camping limit outside the valley is a total of not more than 14 days, expect for Wawona which is limited to 7 days, May 1 - September 15. They are not required for day hikes. Yosemite uses a trailhead quota system that limits the number of people who may begin overnight hikes from each trailhead, each day. This system is designed to avoid overcrowding and to reduce impacts to wilderness areas.
Permits are also available by advance reservation.
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