How hard is it to get a Happy Isles to Little Yosemite Valley wilderness permit for a summer weekend?

Very hard, honestly. Happy Isles to Little Yosemite Valley is one of the highest-demand trailheads in the entire Yosemite wilderness system. It is the shortest route to the park's most famous backpacker camp, it feeds the John Muir Trail corridor, and every Valley visitor with a backpack wants the same July and August Saturdays you do. Expect peak weekend dates to be claimed the moment they become reservable on Recreation.gov.

Three fallbacks preserve most of the experience. Glacier Point to Little Yosemite Valley reaches the same camp from above, trading the waterfall staircase for a descent from 7,200 feet, and runs slightly lower demand. Happy Isles to Illilouette is the same trailhead with a different first-night zone and marginally better availability. And midweek dates on the main itinerary are consistently easier than weekends across the whole system.

Then there are cancellations. Yosemite wilderness reservations get released back when plans fall apart, and summer plans fall apart constantly. Openings on hot trailheads tend to disappear within minutes of appearing, so this is less about refreshing the page occasionally and more about watching continuously or having something watch for you. Plenty of LYV weekends are hiked each summer on permits someone else gave back.