Booking odds · May
Greenough Lake Campground in May: How Hard Is It to Book?
Greenough Lake Campground · MT · Custer Gallatin National Forest
The verdict
Booking difficulty 8 out of 10. Competitive. Be ready when the booking window opens.
May dates tend to fill up in the weeks before arrival.
Greenough Lake Campground in May scores 8 out of 10 for booking difficulty — hard. Competitive. Be ready when the booking window opens.
Across the last 2 years of reservation history, the typical May booking was locked in about 103 days before arrival, with the campground running roughly 27% full that month. The lightest arrival day is Wednesday, so shifting to a midweek start is the single easiest way to improve your odds.
How far ahead people book
Weekend vs. weekday demand
Best odds: arrivals are lightest on Wednesday in May. A midweek arrival is your easiest booking.
Get notified when a spot opens
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When May reservations open
Reservations for Greenough Lake Campground in May 2027 operate on a rolling 6-month window releasing at 7:00 AM ET.
May 1 stays open
November 1, 2026
at 7:00 AM ET
Release style
6-Month Rolling Window
Releases daily 6 months ahead at 7:00 AM ET
Campsites for May 1, 2027 become bookable on November 1, 2026 at 7:00 AM ET. Each subsequent date throughout May releases day-by-day exactly 6 months prior to arrival.
Facility note: Standard Recreation.gov 6-month rolling window: sites become bookable 6 months before arrival at 7:00 AM ET.
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.
Easier nearby options in May
If your dates are flexible, these nearby campgrounds are typically easier to book.
Greenough Lake Campground in May: common questions
- How hard is it to book Greenough Lake Campground in May?
- Greenough Lake Campground rates 8 out of 10 for May — Hard. Competitive. Be ready when the booking window opens.
- How far in advance should I book Greenough Lake Campground for May?
- The typical May reservation was made about 103 days before arrival, so plan to book as early as your dates allow.
- When do May reservations open for Greenough Lake Campground?
- Reservations for Greenough Lake Campground in May 2027 open on a rolling 6-month window. Sites for May 1 become bookable on November 1, 2026 at 7:00 AM ET, with each subsequent day releasing day-by-day 6 months ahead.
- What is the best day to arrive at Greenough Lake Campground in May?
- Arrivals are lightest on Wednesday. A midweek arrival is usually the easiest booking.
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