Campground · MT
RATTIN CAMPGROUND
MT · Custer Gallatin National Forest
Booking is hardest here in May (4/10) and easiest in September (2/10). Pick a month below for the full breakdown.
Booking difficulty by month
Midweek tip: in the busiest month (May), arrivals are lightest on Sunday — shift your dates to improve your odds.
When reservations open
Booking window
Reservations open on a rolling 6-month window at 7:00 AM America/New York.
For example, sites for January 15, 2027 become bookable on July 15, 2026. Set a reminder a few minutes before release for the best shot.
Standard Recreation.gov 6-month rolling window: sites become bookable 6 months before arrival at 7:00 AM ET.
Sites & amenities
- 3 tent-only sites
- 7 RV sites
- Max RV length 30 ft
Activities: HIKING, FISHING, BIKING, HOTEL/LODGE/RESORT PRIVATELY OWNED, NON-MOTORIZED BOATING, OFF ROAD VEHICLE TRAILS, SCENIC DRIVE, WILDLIFE VIEWING