Campground · MT
GREENOUGH LAKE
MT · Custer Gallatin National Forest
GREENOUGH LAKE is generally hard to book. Across the 5 months we have reservation data for, difficulty peaks in June (9/10) and eases to its lowest in September (7/10). The heat strip below breaks down every month — pick one for its full odds, lead-time chart, and easier nearby alternatives.
Booking difficulty by month
Midweek tip: in the busiest month (June), arrivals are lightest on Tuesday — 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 April 15, 2027 become bookable on October 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
- 18 RV sites
- 2 accessible sites
- Max RV length 60 ft
Activities: HIKING, FISHING, CAMPING, BOATING, BIKING, CANOEING, KAYAKING, OFF ROAD VEHICLE TRAILS, SCENIC DRIVE
How much does it cost to camp at Greenough Lake Campground?
The first vehicle is included in the basic fee; A second will be charged an extra $10 fee and collected at the campground, if your site will accomodate it. Firewood bundles can be purchased from the campground host.
Fee details as listed on Recreation.gov. Rates and passes change by season, so confirm the current price on Recreation.gov before you book.