I'm going to be straight with you, because most pages won't be: Yosemite Valley is the single hardest campground to catch in California, and it barely cancels. But there's real data behind that, and there's a smarter play if you keep losing the bid.
I run a scanner that checks Recreation.gov about every five minutes. Over one 13-day stretch I tracked (April 24 to May 6, 2026), Upper Pines reopened from a real cancellation exactly once. That's not a knock on the tool — it's the reality of Yosemite Valley. If you've been refreshing for a Valley site and getting nothing, it isn't your refresh speed. There's simply almost nothing to catch.
So here's the honest math: a tool watching Yosemite Valley 24/7 will catch that rare opening when it happens, and being the first person on it genuinely matters. But you should go in knowing the openings are rare.
In the exact same two weeks, Sequoia Lodgepole reopened 32 times across 24 sites — a 9-out-of-10 Sierra campground among the giant sequoias, on a river, with most of the same magic and a tiny fraction of the competition. If your real goal is "a great Sierra trip this summer," not specifically the Valley floor, Lodgepole is the move, and it actually cancels. Tuolumne Meadows (higher up, opens in July) is another real option with far more availability than the Valley.
Totally fair — there's nothing like waking up under Half Dome. The realistic approach: watch Upper Pines (and Lower Pines, North Pines) 24/7 with a wide date window, and be ready to book in under a minute when the rare cancellation hits. You won't get many shots, so you can't afford to miss the ones that come.
We cover Yosemite (Upper Pines + Tuolumne Meadows) and Sequoia (Lodgepole + Dorst), 24/7, and text you within minutes of a site opening. Set it once and stop refreshing.