Johnson Creek and the Idaho backcountry airstrips where the wilderness is the runway

Johnson Creek (3U2) is a 3,400-foot grass runway at 5,167 feet elevation, carved into a meadow in central Idaho’s Frank Church River of No Return Wilderness. It is one of roughly 30 backcountry airstrips maintained by the Idaho Division of Aeronautics, and it represents one of the most compelling reasons to earn a pilot certificate: landing in places no road can reach.

What Makes Johnson Creek Special

Johnson Creek sits alongside its namesake creek in a valley surrounded by granite peaks and lodgepole pine forests. The strip has a windsock, a pit toilet, and campsites directly adjacent to the runway where pilots can tie down, pitch a tent, and sleep under the stars beside their aircraft.

There is no tower, no taxiway, no terminal. The approach into runway 16 takes you down the valley with terrain rising on both sides and trees close to the flight path. There is no straight-ahead go-around option, which means every approach must be planned and committed to well before pulling the power back.

The strip draws a devoted following. Pilots return year after year — couples from Boise who have been flying their Cessna 185 in every summer for 22 years, groups running annual circuits through multiple backcountry strips, and families introducing the next generation to aviation in the most visceral way possible.

Other Idaho Backcountry Strips Worth Knowing

Johnson Creek is the gateway, but the Idaho wilderness holds dozens more strips, each with its own character.

Indian Creek sits deeper in the wilderness along the Middle Fork of the Salmon River. The runway is roughly 2,200 feet of grass at over 4,000 feet elevation with canyon walls on either side. Landing direction and takeoff direction differ depending on slope. The Indian Creek Guest Ranch offers meals and cabin lodging — pilots fly in for lunch in the middle of a 2.3-million-acre wilderness area.

Flying B Ranch offers another Middle Fork strip with a lodge, hot showers, home-cooked meals, and horseback riding. Fly in, ride horses through postcard-quality wilderness, fly home.

Sulphur Creek is the strip that earns respect. It is a one-way strip — land uphill on runway 33, take off downhill on runway 15. The runway is approximately 1,600 feet and ends at a hillside. There is no reversing the procedure. Experienced backcountry pilots consider it an advanced strip that rewards precision and punishes hesitation. The hot springs at the nearby campsite provide the payoff.

What It Takes to Fly Idaho’s Backcountry

This is not standard pattern work. Backcountry flying in Idaho requires a specific skill set built on mountain flying fundamentals.

Density altitude is a constant factor. Johnson Creek’s 5,167-foot elevation means a hot July afternoon can push density altitude to 7,000 feet or higher. Takeoff distance calculations must be done with real performance data, not estimates.

Key mountain flying practices include approaching ridges at 45-degree angles to allow a turn away from downdrafts, flying the upwind side of valleys, adding airspeed on approach for unpredictable canyon winds and mechanical turbulence, and never flying up a canyon without a confirmed exit.

The Idaho Aviation Association runs an annual backcountry flying course where experienced mountain pilots mentor newcomers before they attempt strips like Johnson Creek. Flight schools in McCall and Boise offer mountain flying endorsements. This training is essential, not optional.

You Don’t Need a Bush Plane

The strips attract heavily modified aircraft — Super Cubs on 35-inch tundra tires, Cessna 180s and 185s loaded with vortex generators, extended flaps, and bush propellers. These airplanes are purpose-built for the environment.

But stock Cessna 172s also show up at these strips, flown by pilots who understand their aircraft’s performance limits and operate within them. The Idaho backcountry does not require a specialized bush plane. It requires good judgment, proper training, thorough performance calculations, and a willingness to turn around when the numbers do not work.

The Community That Keeps These Strips Alive

Without active maintenance, the wilderness reclaims these runways permanently. Once an airstrip disappears in the Frank Church, it does not come back.

The Recreational Aviation Foundation (RAF) has spent over 20 years working to keep backcountry strips open and accessible. They organize volunteer work parties where pilots fly in with chainsaws, rakes, and weed whackers to clear brush, fill ruts, and replace windsocks. Pilots literally maintain their own runways.

The Idaho Aviation Association hosts an annual fly-in at Johnson Creek where dozens of aircraft line the meadow, pilots camp along the runway, and the community gathers over campfires and too much food. It shares the spirit of Oshkosh — scaled down, set in a canyon, surrounded by elk, wolves, and cutthroat trout.

How to Get Started

The strips are public use. The training infrastructure exists. McCall serves as the natural staging point, with flight schools offering mountain flying instruction and easy access to the backcountry strip network. The Idaho Division of Aeronautics maintains an airstrip database with current condition reports.

Get the training first. Then go.

Key Takeaways

Johnson Creek (3U2) is a 3,400-foot grass strip at 5,167 feet in the Frank Church Wilderness, one of Idaho’s roughly 30 state-maintained backcountry airstrips
Density altitude, terrain, and one-way strips make mountain flying training essential — the Idaho Aviation Association and McCall-area flight schools offer structured courses
You do not need a bush plane — stock aircraft work if pilots respect performance limits and are willing to turn around
The Recreational Aviation Foundation and volunteer pilots are the reason these strips still exist; without active maintenance, the wilderness reclaims them
Indian Creek, Flying B Ranch, and Sulphur Creek represent the range of Idaho backcountry flying, from lodge-supported strips to advanced one-way operations