Recreation.gov

When do reservations open at Dimond O, Stanislaus National Forest?

Booking window

12 months ahead

Releases

Daily, 7:00 AM PT

Minimum stay

2 nights on weekends

Reservations open 12 months ahead on a daily rolling basis, at 7:00 AM PT.

Closed for 2026. Next year's Open Season: Apr 26 - Oct 13, 2027 · Last checked Oct 27, 2026

Popular weekends

• Opening weekend 2027 (Arrive Fri, Apr 30 · 2 nights): Open now Watch for cancellations
• Memorial Day weekend 2027 (Arrive Fri, May 28 · 3 nights): Open now Watch for cancellations
• July 4th weekend 2027 (Arrive Fri, Jul 2 · 3 nights): Open now Watch for cancellations
• Labor Day weekend 2027 (Arrive Fri, Sep 3 · 3 nights): Open now Watch for cancellations
• Columbus Day / Indigenous Peoples' Day weekend 2027 (Arrive Fri, Oct 8 · 3 nights): Open now Watch for cancellations

Is there a minimum stay at Dimond O?

• Friday and Saturday nights are booked together.
• A holiday weekend is booked as its full 3 nights.
• Other nights have no minimum.

From Recreation.gov's reservation rules.

Month by month

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• Dimond O: availability and alerts
• Stanislaus National Forest: every campground