Great Valley Grasslands State Park

Gustine, California· Campsite openings, cancellations & sold-out date alerts

State ParksSmall parkWatched around the clock

Sold out for your dates? We'll tell you the second a site opens.

Cancellations at Great Valley Grasslands State Park get rebooked in minutes. We check ReserveCalifornia around the clock and alert you before the crowd refreshes the page.

Set an alert for Gustine$9.99/mo — why we charge

The alert

Here's what lands the second a site opens.

The moment a campsite frees up at Great Valley Grasslands State Park, we send it — with the dates and a one-tap link to book it on ReserveCalifornia before anyone else. Most alerts go out within minutes.

EmailPushText — coming soon

How GetParkAlerts works

  1. 01

    Set your alert for Great Valley Grasslands State Park

    Tell us your dates and how many nights. Takes about 30 seconds.

  2. 02

    We watch, around the clock

    We check ReserveCalifornia every few minutes for the cancellations that vanish before most people notice.

  3. 03

    You get the alert first

    Email or push the instant a matching site frees up. You book it directly with the park — we just get you there first.

Park type

State Parks

Small park

Online booking

Available on ReserveCalifornia

Official state reservation system

Alert coverage

Checked around the clock

Openings, cancellations & new dates

Why campsites open up at Great Valley Grasslands State Park

California's refund rules create a predictable wave of cancellations. Because campers lose money if they cancel late, most drop their reservations right before the refund deadline — which means openings cluster about a week out from any given date.

If they cancel…They get back
7+ days before arrivalFull site fees refunded, minus the cancellation fee
2–6 days beforeFirst night's fee forfeited; the rest refunded, minus the fee
Under 2 days / no-showNo refund — all fees forfeited

Source: California State Parks camping policies (refund schedule for arrivals on or after July 1, 2026).

How booking Great Valley Grasslands State Park works

  • Sites are reservable up to 6 months ahead on a rolling window — each new date opens exactly six months out.
  • New inventory releases every morning at 8:00 a.m. Pacific Time.
  • There is no waitlist — a cancelled site just reappears in search, first-come, first-served.
  • Have your login and payment saved so you can book in under a minute when your alert lands.

Source: ReserveCalifornia FAQ (California State Parks).

Where Great Valley Grasslands State Park is

31426 GONZAGA RD

Gustine, CA 95742

37.2970, -120.8520

Get directions

Getting a campsite at Great Valley Grasslands State Park

How do I get a campsite at Great Valley Grasslands State Park when it's sold out?

Cancellations happen constantly — the trick is being first to know. Set an alert for your dates and we'll watch Great Valley Grasslands State Park on ReserveCalifornia around the clock, then notify you the moment a site opens. Alerts run on a Pro subscription ($9.99/mo, cancel anytime).

How far ahead can I book Great Valley Grasslands State Park?

California State Parks campgrounds, including Great Valley Grasslands State Park, are reservable up to 6 months in advance on a rolling daily window — each new date becomes bookable exactly six months out, released at 8:00 a.m. Pacific Time. Peak summer and holiday dates at popular parks can sell out within minutes of release.

When do campsites usually open up at Great Valley Grasslands State Park?

Openings are driven by California's cancellation policy. Campers get a full refund (minus the fee) only if they cancel 7+ days before arrival; cancel 2–6 days out and they forfeit the first night; under 2 days there's no refund. That refund cliff produces a predictable wave of cancellations around 7 days before a date — the best window to catch an opening at Great Valley Grasslands State Park.

Does ReserveCalifornia have a waitlist for Great Valley Grasslands State Park?

No. ReserveCalifornia has no waitlist or notification feature. When a site at Great Valley Grasslands State Park is cancelled it simply returns to inventory at full price, first-come, first-served — whoever books it first gets it. That's exactly why an alert service exists.

How fast do cancelled sites get rebooked at Great Valley Grasslands State Park?

At high-demand California parks a cancelled summer-weekend site is often rebooked within minutes — sometimes under a minute. Being notified the instant it opens, with your ReserveCalifornia login and payment already saved, is the difference between getting in and missing it.

Where do I book a campsite at Great Valley Grasslands State Park?

Reservations for Great Valley Grasslands State Park are made on ReserveCalifornia, the official booking system for California State Parks. GetParkAlerts is independent — we tell you when a site opens; you book it directly on the official site.

Does GetParkAlerts reserve the site for me?

No — we never hold or book sites. We tell you the second one opens so YOU can book it on ReserveCalifornia before anyone else. Booking always happens on the official state system.

Parks near Great Valley Grasslands State Park

Flexible on where you camp? Watch a few of these too — more parks, better odds.

All California state parks →See every California state park on the map →Browse all parks →