No detected openings were recorded in the last 90 days. Campsite Sniper monitors Blackmore Campground continuously and will alert you if that changes.
Of the 99 tracked site-nights (Sep 18 – Sep 26, 2026): 99 on sites not offered for online reservation (first-come, first-served or administrative). Of the facility's 11 monitored sites, 7 can be reserved online and 4 are first-come, first-served.
No online availability right now
Load status
Sep 18 – Sep 26, 2026Of the 99 tracked site-nights (Sep 18 – Sep 26, 2026): 99 on sites not offered for online reservation (first-come, first-served or administrative).
Open dates by month
Sep 2026 – Sep 2026No month in range currently shows online availability. 0 open site-nights across the tracked window — these site-nights are on sites not offered for online reservation.
Holiday windows
Sites open per night · of 11 sites| Window | Night | Sites open | Status |
|---|---|---|---|
| Labor Day | SAT Sep 5 | 0 | None open |
| SUN Sep 6 | 0 | None open | |
| MON Sep 7 | 0 | None open |
Labor Day: no online availability on any tracked night.
About Blackmore Campground
Blackmore Campground is a campground in Custer Gallatin National Forest with 11 mapped sites. 7 of its sites can be reserved online; 4 are first-come, first-served. Sites accommodate RVs up to 45 ft. It is a no-hookup campground. Pets are welcome at some sites and most sites have a fire pit. Maximum party size is 8. None of the 99 tracked site-nights are currently open for online reservation; that can reflect reservations, closures, unreleased dates, or first-come, first-served inventory. Campsite Sniper watches the targets you choose and alerts you when one frees up. We never book, hold, or pay for reservations; you book directly on Recreation.gov.
Getting there
View on Recreation.gov ↗ Get directions ↗
Photo gallery
FAQ
How do I get a reservation at Blackmore Campground?
Campsite Sniper's current snapshot shows none of the 99 tracked site-nights open for online reservation at Blackmore Campground. That can mean dates are reserved, closed, not yet released, or offered first-come, first-served rather than online. Pick a site on the map to see its calendar, or set a free Campsite Sniper alert. You complete the reservation yourself on Recreation.gov.
Does Campsite Sniper book this campground for me?
No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.
How current is this availability data?
Campsite Sniper re-checks public Recreation.gov availability for this facility every hour and republishes whenever anything changes. This facility's data last changed at Sep 18, 2026 14:17 UTC; an older timestamp means nothing has changed since that time, not that checking stopped. Always confirm final availability on Recreation.gov when you book.
Which sites at Blackmore Campground fit a 35-foot RV?
7 of the 11 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 45 ft.
Does Blackmore Campground have online availability right now?
As of the Sep 18, 2026 snapshot, none of the 99 tracked site-nights are open for online reservation. That can mean dates are reserved, closed, not yet released, or offered first-come, first-served rather than online. A free Campsite Sniper alert tells you if any date opens online.
Stop refreshing. Let the app watch it.
Lakefront, hookups, your RV length, weekends only - set it as picky as you want.
We run paced availability checks for Blackmore Campground. One watch covers every matching online-reservable site.
When a match opens, you get a push with a Recreation.gov link so you can review and book it yourself.
Alerts monitor online-reservable inventory only; first-come, first-served sites are not included.