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Hard to BookNational Forest

Thompson Flat Campground

Sawtooth National Forest, Idaho

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As of October 2026, Thompson Flat Campground is a campground in Sawtooth National Forest, Idaho with 11 campsites. Thompson Flat Campground is booked through Recreation.gov.

PermitSnag checks Thompson Flat Campground for availability and tells alert holders when a site opens up.
Thompson Flat Campground is located at 42.3247° N, 113.6236° W.

people allowed on 4 of 11 sites: 8
people allowed on the largest site: 64

Thompson Flat Campground reservations and next available dates

October 2026

November 2026

open, tap to book on Recreation.govsold outin your alert

Stay and booking rules

Group bookings open: 6 Months

Published by Recreation.gov for Thompson Flat Campground, read on September 30, 2026.

Campsites at Thompson Flat Campground

26101112171920

Standard 8
Group 3
Accessible 11

What an RV fits

48 ft1 site
50 ft1 site
52 ft1 site
53 ft1 site
56 ft1 site
60 ft6 sites

Amenities

restrooms

At a glance: Setting: Mountain · Access: Gravel road.

Things to do: fishing, boating, hiking, photography, offroad, horse riding.

All sites at Thompson Flat Campground, as listed by Recreation.gov

Site	Loop	Type	Sleeps	Max RV	Access
A1 -A5	LOOP A	Group	40	60 ft	Accessible
B1 -B8	LOOP B	Group	64	60 ft	Accessible
C1-C4	LOOP C	Group	56	60 ft	Accessible
02	THOMPSON FLAT	Standard	16	50 ft	Accessible
06	THOMPSON FLAT	Standard	8	48 ft	Accessible
10	THOMPSON FLAT	Standard	16	60 ft	Accessible
11	THOMPSON FLAT	Standard	8	56 ft	Accessible
12	THOMPSON FLAT	Standard	16	60 ft	Accessible
17	THOMPSON FLAT	Standard	8	60 ft	Accessible
19	THOMPSON FLAT	Standard	16	52 ft	Accessible
20	THOMPSON FLAT	Standard	8	53 ft	Accessible

About Thompson Flat Campground

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.

Rules and notices at Thompson Flat Campground

Recreation.gov does not date these notices. We last read them on September 30, 2026. Check Thompson Flat Campground on Recreation.gov

Notices from Recreation.gov

Idaho OHV Safety Message

Campground is normally snow-covered and closed until after July 4

The drinking water system is not currently operable, a new well installation is planned; call the Minidoka District Office at 208-678-0430 for latest information on drinking water availability

Off-road vehicle use is prohibited within the campground

Click here for more information on the Sawtooth National Forest

Don't Move Firewood: Help prevent the spread of tree-killing pests in our national forests by obtaining firewood near your destination and burning it on-site. For more information visit dontmovefirewood.org.

Recreation.gov permit and campground cancellations →

Thompson Flat Campground FAQ

How hard is it to get a campsite at Thompson Flat Campground?

Thompson Flat Campground is rated "Hard to Book" based on historical demand. This campground is popular and often books out weeks in advance. Your best strategy is to monitor cancellations.

How do I find last-minute availability at Thompson Flat Campground?

Cancellations happen frequently at Thompson Flat Campground, especially 1-2 weeks before check-in dates. PermitSnag monitors availability 24/7 and sends instant alerts when sites open up due to cancellations. This is often the best way to snag popular campsites.

How many campsites does Thompson Flat Campground have?

Thompson Flat Campground has 11 campsites.