Camping Lottery vs. First-Come, First-Served: How Recreation.gov Allocates Sites

Recreation.gov actually runs three different systems, and confusing them is what makes booking feel random. Most campgrounds use a rolling window: sites open a fixed number of months out, first-come-first-served among everyone refreshing at that moment. Lotteries only apply to a small number of high-demand permits. Walk-up first-come, first-served is a third, separate category — real, but rarer than assumed.

Key takeaways

• Recreation.gov uses three distinct allocation mechanisms: rolling-window reservations, lotteries, and true first-come-first-served (no reservation at all).
• Rolling-window booking is the default for the large majority of reservable campgrounds — sites open on a set schedule, then it's a race among everyone trying at that moment.
• Lotteries are reserved for a small number of extremely high-demand permits, not for booking a specific campsite.
• True walk-up first-come-first-served still exists, mostly at smaller National Forest and BLM sites, but it's rarer at popular parks than most people think.
• The system varies by listing, so check the specific campground or permit page before assuming which one applies.

Three different systems, one confusing website

Ask someone why they couldn't get a campsite and they'll often say "it's a lottery," even when it isn't one. That mix-up happens because Recreation.gov hosts all three allocation systems on the same platform, with the same look and feel, and doesn't always make the distinction obvious on the page you're looking at.

Here's the short version of how they differ:

• Rolling-window reservations — a fixed number of months before an arrival date, new nights open up and it's first-come-first-served among whoever is trying at that exact moment. This is the default for most reservable campgrounds.
• Lotteries — a preseason drawing used for a small number of permits where demand is so far beyond supply that a rolling window would just create an instant, unfair crash instead of a fair result.
• True first-come-first-served — no reservation exists at all. You show up and take an open site if there is one, no booking window involved.

They solve different problems. A rolling window works when demand is high but not overwhelming — there's enough turnover and enough sites that a first-come rush produces a reasonably fair outcome over a season. A lottery works when demand is so lopsided that a rush would be pointless. And true first-come-first-served survives where reservations were never worth the overhead to begin with.

Because the rule isn't universal, campsiteodds tracks it campground by campground rather than assuming one default for the whole site — see our methodology page for how we model each campground's actual booking-window rule, including the cases where it deviates from the norm.

Rolling-window reservations: the default for most campgrounds

This is the system behind the large majority of Recreation.gov campground listings, and it's the one that produces most of the frustration people mistake for a lottery. Here's how it works in practice: a campground opens bookings a set number of months ahead of the arrival date — commonly around six months for many National Park Service campgrounds, though the exact window varies by campground and agency. The moment that window opens for a given date, it's first-come-first-served among everyone trying to book it right then. No drawing, no odds calculation on Recreation.gov's end — just who clicks fastest.

Upper Pines Campground in Yosemite National Park is a clear example of how competitive this can get. It's a 240-site campground, and it's famously among the hardest to book on Recreation.gov, precisely because it runs on a rolling window rather than a lottery — sites simply become available on a schedule, and demand outstrips supply almost instantly when they do.

Devils Garden Campground, the only campground inside Arches National Park, works the same way. With just 57 sites serving one of Utah's busiest parks, dates routinely book out months ahead once they open, again through the same first-come rush rather than any drawing.

If a listing lets you pick a specific arrival date and simply shows nights as "available" or "not available" with a countdown to when future months unlock, you're looking at a rolling window. We break down exactly how that countdown works, and how to time your attempts around it, in How Recreation.gov's Booking Window Actually Works.

Lotteries: for the handful of things demand can't otherwise sort out fairly

Lotteries show up on Recreation.gov for a narrow set of extremely high-demand permits and access points — places where the number of people who want in is so much larger than the number of spots that a first-come rush wouldn't be fair to anyone. Instead, applications open for a set period, and winners are drawn afterward.

The best-known example is the Half Dome cables permit in Yosemite National Park. It's worth being precise about what this actually is: a preseason lottery for a hiking permit to ascend Half Dome's cable route, not a reservation for a campsite. It's Recreation.gov's most recognizable lottery, and a genuinely accurate example of how the mechanism works — but it's a permit system, separate from campground booking entirely.

None of the campgrounds covered on campsiteodds are lottery-based. Every campground in our inventory, including the ones named in this article, runs on a rolling window. If you see a listing that asks you to "apply" during a set window rather than "book" a specific date, that's your signal you're looking at a lottery, not a campground reservation.

True first-come-first-served: still real, just rarer than people think

The third system is the simplest: no reservation exists at all. You drive up, and if a site is open, it's yours. This still exists on Recreation.gov's map and on many federal land pages more broadly — it's common on smaller National Forest and BLM campgrounds, in overflow areas near popular parks, and on some walk-up loops attached to larger campgrounds.

What trips people up is assuming this is more common at popular national parks than it actually is. Most of the marquee campgrounds inside national parks — the ones people search for by name — have moved to reservation systems precisely because true first-come-first-served couldn't handle the demand without turning into a parking-lot line before dawn. Where it survives is mostly at the edges: smaller, less-visited sites where a rolling window or lottery would be overkill for the level of demand.

If a campground doesn't show up on Recreation.gov's booking calendar at all, or its page says something like "sites are not reservable," that's a strong sign it's first-come-first-served — but always confirm on the specific listing, since rules do change.

How to tell which system a specific listing on Recreation.gov actually uses

You don't have to guess. A few concrete things to check on any Recreation.gov listing:

1. Look at the page's action button. "Book Now" with a calendar means a rolling-window reservation. "Apply" with a fixed application period and a later drawing date means a lottery.
2. Check how far out the calendar goes. Rolling-window campgrounds show a specific cutoff date for future availability — that's the booking window in action.
3. Look for the phrase "not reservable." If a listing explicitly says sites can't be reserved, you're looking at first-come-first-served.
4. Check the permit vs. campsite distinction. Lotteries on Recreation.gov are almost always tied to permits — climbing routes, river trips, specific trailheads — rather than a plain campsite booking.
5. Cross-check with a source that's already done the legwork. Campsiteodds documents the actual booking-window rule for every campground we score, because it isn't the same everywhere — see methodology for how that's built, and how it feeds into the booking-difficulty score we publish for each campground and month.

If you're trying to plan around a rolling-window campground specifically, browsing by month can help you see where the pressure is lower — Watchman Campground in Zion and Mather Campground at the Grand Canyon's South Rim are both year-round, rolling-window campgrounds worth comparing against your target dates before you assume nothing's open.

For more on how we built this and who's behind it, see about campsiteodds.

Frequently asked questions

Is Recreation.gov a lottery system?

No. Recreation.gov hosts three different allocation systems, and lotteries are the smallest slice. Most campground reservations use a rolling booking window instead, where dates open on a schedule and it's first-come-first-served among everyone trying at that moment. Lotteries are reserved for a limited set of high-demand permits, not typical campsite bookings.

What's the actual difference between a lottery and first-come-first-served?

A lottery is a preseason drawing: you apply during a window, and winners are chosen afterward, with no advantage to applying first. First-come-first-served has no drawing — whoever claims an open date or site first gets it, whether that's the instant a rolling window opens online or a physical site at a campground with no reservations at all.

How far in advance can I book a campsite on Recreation.gov?

It depends on the campground. Many National Park Service campgrounds commonly use a window of around six months before the arrival date, but this varies by campground and managing agency — some are shorter, some longer. Always check the specific listing's booking window rather than assuming a single rule applies everywhere.

Do national parks use camping lotteries for campsites?

Lotteries on Recreation.gov are typically used for permits, not standard campsite bookings — the Half Dome cables permit in Yosemite is the clearest example. The vast majority of national park campgrounds, including well-known ones like Upper Pines in Yosemite and Devils Garden in Arches, are booked through a rolling reservation window instead.

Can I still find first-come-first-served campgrounds?

Yes, though they're less common at popular national parks than many people expect. True first-come-first-served is more typical on smaller National Forest and BLM campgrounds, overflow areas, and some walk-up loops. A listing that says "not reservable" or doesn't appear on Recreation.gov's booking calendar is usually first-come-first-served — confirm on the specific page.

How do I figure out which system a specific campground uses before I plan a trip?

Check the listing itself: a "Book Now" button with a calendar means a rolling window; "Apply" with a set deadline and drawing means a lottery; "not reservable" means first-come-first-served. Campsiteodds also documents the confirmed booking-window rule for every campground it scores — see methodology for details.