Tent Sites
Fires Unknown
Pets Unknown
Water Unknown
About Thompson Flat

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.


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.


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.

ADA Access: N

$8.00 - $50.00
National Forest
Drive In
ADA Accessible
Phone Service
Picnic Table
No WiFi
Thompson Flat is located in Idaho
42.3247 N
-113.6236 W
Get Directions
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.
3 Reviews of Thompson Flat
Gorgeous Alpine Camping in Southern Idaho!

This is one of the last campgrounds you come across before arriving at the turnoff for Lake Cleveland.  It has a ton a ton of spots but they are pretty close together so try to camp here during the weekday or if you have to come here on a weekend go to the campground immediately before Lake Cleveland as it is a little more secluded and the sites are more spaced out.  If you're planning on having a large get together or party in the mountains then this is the best campground to come to!

Each campsite has a minimum of a metal fire ring and BBQ grill, picnic tables and some even have a large metal BBQ pit thing.  The large sites also have massive fire rings where you could basically get a bonfire going!  There are trash cans and vault toilets scattered throughout the campground.  The only problem I had with the campground is that there isn't a map and the roads through it are narrow and confusing.  Other than that this is an amazing spot to spend the weekend or a few days during the week

Beautiful, inexpensive, overall great experience!

We went in the beginning of July and the wild flowers were gorgeous, my kids were in heaven! Our site was not too close to any others except the other one we booked with friends. Decent bathrooms. Close to Lake Cleveland. Great birding in the actual campground. This campground is one of the best places to find the Cassia Crossbill. We will definitely be going back!

First to Review
Group site B

Before and after Thompson Flat's "make-over", I've been to the group sites many times for reunions or girls camps. My favorite is Group site B. Each individual family can have their own campsite which all circle a large firepit/cooking area. It has the best shade of the 3 group sites. I'm still a bit disappointed they haven't worked out the water issue. We always bring a lot though……4 stars…5 as soon as there's water!