Openings · last 7 days
0
01 · Detected Opening History · the openings record · file CS-234192
When Thompson Flat reopens
Thompson Flat's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
0
Openings · last 90 days
1
Only 1 opening in the last 90 days: not enough recent activity for a reliable pattern. A free Campsite Sniper alert watches around the clock instead, and pings you the moment one opens.
02 · Availability Outlook · Sep 18 – Sep 30, 2026 · of 11 monitored sites
Of the 143 tracked site-nights (Sep 18 – Sep 30, 2026): 61 open for online reservation · 22 reserved · 60 on sites not offered for online reservation (first-come, first-served or administrative).
Where the open windows are
57.3% of tracked site-nights are not currently open for online reservation. 61 of 143 remain open; here is where they are.
Load status
Sep 18 – Sep 30, 2026Not open online57.3%
Open site-nights61 / 143
Reserved (of online inventory)22 / 83
Weekday openings33
Weekend openings28
Of the open site-nights on mapped sites, 33 fall on weekdays and 28 on weekends (Fri–Sun).
Open dates by month
Sep 2026 – Sep 2026September holds the most room. 61 of 143 site-nights are still open there.
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.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 02 | 6 |
| 06 | 6 |
| 10 | 6 |
| 11 | 6 |
| 12 | 6 |
The 5 sites with the most open site-nights in the current snapshot. Pair a bookable date with a free alert to cover everything else.
Next windows
As of Sep 18, 2026 snapshotNext open dateFri · Sep 25
Next open weekendFri · Sep 25
The next bookable night is Sep 25; the first open weekend starts Sep 25. Campsite Sniper can watch later dates for you.
Stays and site detail
61 open site-nights across 11 sites at Thompson Flat, from the same hourly snapshot as everything above.
Multi-night stays. 11 2-night, 11 3-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 25 at site 02.
RV length. Longest recorded site here is 60 ft. 11 sites take 25 ft, 11 sites take 35 ft, 11 sites take 40 ft.
All 11 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 02 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| 06 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| 10 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| 11 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| 12 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| 17 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| 20 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| A1 -A5 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| C1-C4 | 60 ft | None | 6 | 6 nights | Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 |
| B1 -B8 | 60 ft | None | 4 | 4 nights | Sep 27, Sep 28, Sep 29, Sep 30 |
| 19 | 60 ft | None | 3 | 3 nights | Sep 28, Sep 29, Sep 30 |
About Thompson Flat
Overview
Thompson Flat Campground is located high in the Albion Mountain Range of southern Idaho, near the towns of Declo and Albion. Visitors enjoy the area for its abundant trails, alpine lakes and scenic beauty.
Recreation
The Twin Lakes Campground area is located just outside the campground and across the road. It offers picnic areas, horse corrals and access to a variety of trails.
Lake Cleveland is a two-mile drive from the campground, offering fishing, canoeing and trail opportunities. Several additional hiking, mountain biking, horse and off-road vehicle trails are on the mountain.
Facilities
The campground contains three group sites, which can accommodate from 40 to 64 people, respectively. All sites are equipped with large picnic tables and campfire rings with grills. There are four reservable single units and four double unit campsites as well as 17 additional single-family campsites that are available on a first-come, first-served basis, but the group sites must be reserved.
Accessible vault toilets are provided. A campground host is located on-site. Roads and parking spurs within the campground are gravel.
Natural Features
The campground is situated in a beautiful wildflower-filled meadow lined with tall pine and fir trees, on the eastern slope of Mount Harrison. It sits at an elevation of 8,400 feet.
Nearby Attractions
A visit up the road to the Mount Harrison Lookout offers interesting area information and breathtaking panoramic views of the valleys below.
Pomerelle Ski Area, just below Thompson Flat, offers lift-served hiking and mountain biking, scenic chairlift rides and a few dining options, generally on weekends.
11 monitored sitesRVs up to 60 ftNo hookups11 shadedPets OKFire pitsMax party 64
Getting there
From Interstate 84, take exit 216 and follow State Highway 77 south for approximately 18 miles, through the towns of Declo and Albion, to Howell Canyon Road. Turn west at the Pomerelle Ski Area sign and drive seven miles up the canyon on Howell Canyon Road. The road is steep and winding, watch for the campground entrance sign on the right.
2306 Hiland Ave, Burley, ID 83318208-678-0430
BikingBoatingCampingFishingHikingHorseback RidingHuntingWildlife Viewing
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-234192 · facility + sites
Photo gallery
Roll CS-234192 · Thompson Flat · Burley ID12 frames · facility + sites
FAQ
How do I get a reservation at Thompson Flat?
Reservations for Thompson Flat are made through Recreation.gov. 61 of 143 tracked site-nights are currently open (42.7%). Campsite Sniper has also detected 1 site opening here in the last 90 days, so further dates may appear. 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 15:19 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.
How often do new openings appear at Thompson Flat?
Campsite Sniper detected 1 site-date opening here over the last 90 days, none in the last 7. A free alert watches around the clock and pings you the moment one appears.
Can I get a multi-night stay at Thompson Flat?
11 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 25 at site 02. Confirm and book on Recreation.gov.
Which sites at Thompson Flat fit a 35-foot RV?
11 of the 11 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 60 ft.
Which month has the most availability at Thompson Flat?
September 2026, with 61 open site-nights in the current snapshot of 143.
When is the next open date at Thompson Flat?
As of the Sep 18, 2026 snapshot: the next open date is Fri, Sep 25 and the next open weekend starts Fri, Sep 25. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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