Thompson Flat
Its 11 sites are reservable through Recreation.gov. Thompson Flat is a National Forest campground near Cassia, Idaho.
Reservable: Recreation.gov
- National Forest
- Managed by
- None
- Hookups
- 60 ft
- Max RV length
Thompson Flat sits inside Sawtooth National Forest. Its dispersed-camping rule, ranger offices, and boundary are on publiclandsdb.com.
Getting a site
- Managed by
- National Forest
- Reservations
- Recreation.gov Book a site
- Fee
- Fee unknown, see agency
Source: recreation.gov, accessed 2026-09-30
Sites and hookups
- Total sites
- 11
- Group sites
- 3
- Hookups
- None
- Max RV length
- 60 ft
- Site driveways
- Back-in
- ✓ Fire rings
- ✓ Pets allowed
On site: Fire rings and pets allowed.
Source: recreation.gov, accessed 2026-09-30
Campsites
11 sites in 4 loops; the longest takes a 60 ft vehicle. Every site below links to its own page on Recreation.gov, where it is booked. Official site list and booking on recreation.gov.
| Book | ||||||||
|---|---|---|---|---|---|---|---|---|
| A1 -A5 | LOOP A | Group standard nonelectric | 60 ft | Back-in | Not on record | Yes | Yes | Book loop LOOP A, site A1 -A5 |
| B1 -B8 | LOOP B | Group standard nonelectric | 60 ft | Back-in | Not on record | Yes | Yes | Book loop LOOP B, site B1 -B8 |
| C1-C4 | LOOP C | Group standard nonelectric | 60 ft | Back-in | Not on record | Yes | Yes | Book loop LOOP C, site C1-C4 |
| 02 | THOMPSON FLAT | Standard nonelectric | 50 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 02 |
| 06 | THOMPSON FLAT | Standard nonelectric | 48 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 06 |
| 10 | THOMPSON FLAT | Standard nonelectric | 60 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 10 |
| 11 | THOMPSON FLAT | Standard nonelectric | 56 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 11 |
| 12 | THOMPSON FLAT | Standard nonelectric | 60 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 12 |
| 17 | THOMPSON FLAT | Standard nonelectric | 60 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 17 |
| 19 | THOMPSON FLAT | Standard nonelectric | 52 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 19 |
| 20 | THOMPSON FLAT | Standard nonelectric | 53 ft | Back-in | Not on record | Yes | Yes | Book loop THOMPSON FLAT, site 20 |
Data source: Recreation.gov , accessed 2026-09-30. Site details are Recreation.gov's own per-site listing and can differ from the campground-wide facts above.
Rules
- Pets
- Allowed
Source: recreation.gov, accessed 2026-09-29
Access and cell service
- Elevation
- 8,036 ft
42.3247, -113.6236 in Cassia. Open in OpenStreetMap. Map © OpenStreetMap contributors.
Common questions
Do you need a reservation at Thompson Flat?
Sites at Thompson Flat are reserved through Recreation.gov (https://www.recreation.gov/camping/campgrounds/234192).
How many campsites does Thompson Flat have?
Thompson Flat has 11 campsites, including 3 group sites.
Does Thompson Flat have RV hookups?
No. Thompson Flat has no hookups. The longest rig allowed is 60 feet.
Are there pull-through sites at Thompson Flat?
Recreation.gov lists no pull-through sites at Thompson Flat; 11 sites with a stated driveway are back-in or parallel.
Are dogs allowed at Thompson Flat?
Yes, pets are allowed at Thompson Flat.
Who manages Thompson Flat?
Thompson Flat is managed by the U.S. Forest Service.
Around Thompson Flat
- Sites
- Not on record
- Season
- Not on record
- Fee
- Single Site: $8 per night
- Sites
- 1
- Season
- Not on record
- Fee
- Not on record
- Sites
- 7
- Season
- 07-13 to 09-30
- Fee
- Site: $10 per night
- Sites
- Not on record
- Season
- Not on record
- Fee
- Single Site: $10 per night
More campgrounds: camping near Cassia and campgrounds in Cassia.
Sources
- recreation.gov (name, coordinates, manager, campsites, hookups), accessed 2026-09-30
- recreation.gov (name, coordinates, manager, reservationSystem, reservationSystemName, reservationUrl, maxRvLengthFt, drivewayType, petsAllowed, fireRings, sites, campsites), accessed 2026-09-29
- epqs.nationalmap.gov (elevationFt), accessed 2026-10-01