Last Updated: July 10, 2026 | By E3 Aviation Editorial Team
Sun Valley in July isn’t really an airport story. It’s a valley story with two airports in it. Friedman Memorial (KSUN) sits at 5,318 feet in Hailey, elbowed in by ridgelines on both sides. Smiley Creek (U87) sits 45 minutes north at 7,206 feet on grass, right at the mouth of the Idaho backcountry. Together they make one of the best Lane 2 weekends a GA pilot can put on the calendar this summer.
We wrote this Sun Valley fly-in guide for one reason. Too many pilots treat KSUN as “just another mountain airport” and never see Smiley Creek at all. That’s the mistake. You want the tower services and rental cars at KSUN and the caretaker and the pie at U87. Both, same weekend, done right.
Why the Sun Valley Fly-In Belongs on Every GA Pilot’s Summer List
Sun Valley is rare in the American West. A paved 7,550-foot runway and a grass strip in a wilderness bowl live 40 nautical miles apart. That combination is rare. Most pilots pick one or the other and miss the point.
Land at KSUN and you get tower services, a full FBO in Atlantic Aviation, and rental cars. Hot showers and a shuttle up to Ketchum, too. Land at U87 and you get a state caretaker walking out with a smile. Crew car keys in the ignition. A walk across the Boise River to a fly-in restaurant with hand-lettered hours. Same trip. Two very different halves.
The Sun Valley fly-in also works as a graduated challenge. Fly into KSUN. Adjust to the density altitude. Sleep. Depart for U87 in the morning. Twenty minutes later you’re on a grass strip most of your friends will never see. That’s Lane 2 done right. Entertainment, adventure, and a story for Monday’s hangar coffee.
Friedman Memorial (KSUN): What the Chart Doesn’t Tell You
Friedman Memorial is the primary Sun Valley fly-in airport. It sits in Hailey. That’s 11 miles south of Ketchum and Sun Valley proper. Field elevation is 5,318 feet MSL. The single runway is 13/31, 7,550 feet long. Runway 31 approaches along the east side of the valley.
Approach and departure services come from Salt Lake ARTCC via Burley RCAG on 118.05 / 363.0. Summer field hours run 0630 to 2100 local. That’s tight. Late east-coast arrivals need to check the current NOTAM package before every leg.
The One Chart Note That Changes the Whole Arrival
KSUN publishes a voluntary noise abatement program. The heart of it: avoid landing from the north over the City of Hailey. That one sentence rewrites how most piston pilots plan the arrival. You’ll almost always set up for runway 31 southbound. Work the valley on the east side of the Big Wood River.
Compliance depends on weather, ATC instructions, aircraft performance, and pilot familiarity. Translation: they’ll accommodate you if the wind demands runway 13. But if the wind is calm — most summer mornings — plan for 31. Don’t fight the pattern.
Density Altitude at KSUN: Not Optional Math
Field elevation 5,318 feet plus a 90-degree Idaho afternoon pushes density altitude past 8,500 feet on a KSUN takeoff roll. That’s not a small piston-single problem. That’s a real performance conversation. Our hot-day density altitude takeoff guide walks through the math. Also the runway-length trap that catches transient pilots every summer.
Two rules of thumb we use for KSUN summer arrivals:
- Plan the departure for early morning. First-light takeoffs in July at KSUN often see density altitude below 7,500 feet. By noon it’s a different airport.
- Land with lighter fuel than you’d fly into a sea-level field. Yes, gas is expensive at Atlantic. Yes, you still land light. Runway length becomes stopping performance. Not just takeoff performance.
Ground Services at KSUN: What Atlantic Aviation Actually Does
Atlantic Aviation is the sole FBO at KSUN, located at 2230 Aviation Drive in Hailey. That means one desk, one fuel truck, and one line crew. Every piston single, King Air, and G650 shares that ramp. In July that ramp gets busy. Call ahead.
Standard Atlantic services include Jet-A and 100LL, crew cars, rental cars, and lodging reservations. Also a public notary, 24-hour surveillance, and on-site aircraft maintenance. The maintenance capability matters. If your airplane picks up a squawk on the way in, a shop on the field saves the trip. No rental-car nightmare.
Fuel prices at KSUN track other resort-town FBOs. Expect a premium over Boise or Twin Falls. Some pilots plan a fuel stop at KTWF or KBOI on the way in. Tanker cheaper avgas that way.
The Ketchum Shuttle Problem, Solved
KSUN is in Hailey, not Sun Valley proper. Ketchum is 11 miles north. Sun Valley Resort is another two miles past that. Rental-car math runs $80 to $120 a day in July for the smallest class. Book a week ahead, not on arrival. Resort-town car inventory disappears in summer.
Cheaper option: the Mountain Rides valley bus. It runs Hailey, Ketchum, and Sun Valley all summer. Free for riders. Grab your bag, walk out the Atlantic gate, and catch a bus. This is the move if you’re staying downtown Ketchum and don’t need wheels.
The Smiley Creek Half: U87 in a Sentence
Smiley Creek (U87) is 40 nautical miles north of KSUN. Halfway between Sun Valley and Stanley. Field elevation is 7,206 feet MSL. The runway is grass. The CTAF is 122.9. That’s the whole airport. It’s one of four Idaho backcountry strips where the state hires a seasonal caretaker to greet visiting pilots.
Smiley Creek is the traditional gateway to the Idaho backcountry. Johnson Creek, Cabin Creek, Bruce Meadows, and the rest of the Middle Fork strips are a short hop away. It’s also the least intimidating strip to fly. Grass, sure. High-elevation, definitely. But it’s straight and open on both ends. The surrounding terrain doesn’t box you in the way Johnson Creek does.
Why We Send New Backcountry Pilots to Smiley Creek First
Honestly, this is where we’d push back on the “just go straight to Johnson Creek” crowd. For most pilots, Smiley Creek is a better first backcountry landing. Here’s why:
The strip is at 7,206 feet. That forces you to fly the density altitude math before you land. Healthy habit. But the runway itself is friendly. It’s wide and well-maintained by the Idaho Division of Aeronautics. Clear go-around options in both directions. Nothing about the approach or departure requires bush-pilot skills.
Land at Smiley Creek. Talk to the caretaker. Walk into town. Look at the terrain around you. If it feels comfortable, you’re ready for the next step deeper into the backcountry. If it feels tight, back off. Come back next summer with more time. That’s how a Sun Valley fly-in trip becomes a proficiency ramp. Not just a photo op.
Communications and Airspace: KSUN to U87 in One Radio Call
KSUN operates as a Class D-style controlled field during tower hours. Salt Lake ARTCC handles approach and departure. Departing north for Smiley Creek, expect a frequency change to CTAF 122.9. Well before you enter U87’s traffic pattern.
The route tracks the highway north through the Big Wood valley. Over Galena Summit at about 8,700 feet. Then a descent into the Sawtooth Valley on the north side. Direct is fine in good VFR. But most pilots follow the road for terrain reference. Cell coverage disappears at Galena. File a VFR flight plan or use Garmin inReach for tracking. Our field guide to reading PIREPs is worth a re-read the night before. Mountain wave and afternoon turbulence over Galena are consistent summer signatures.
Our Take on Radio Discipline on the U87 CTAF
Here’s what most transient pilots get wrong at Smiley Creek. They treat 122.9 like a Sunday-afternoon uncontrolled field back home. It isn’t. Smiley Creek shares its CTAF with dozens of nearby strips. Traffic in July is heavy. Position calls need to be specific. “Smiley Creek traffic” — not just “traffic.” Location, altitude, and intention. Every call.
Second: listen before you talk. Turn the volume up. Local pilots often self-announce at reporting points that don’t show on your sectional. That’s the ballgame at U87. Situational awareness comes from the radio, not the transponder.
What to Do on the Ground: The 48-Hour Sun Valley Fly-In Itinerary
A weekend Sun Valley fly-in works if you plan it like a two-day operation. Not a single arrival. Here’s the itinerary we run:
Friday afternoon: KSUN arrival. Fuel, tie down, rental car or Mountain Rides bus into Ketchum. Dinner and a walk. Baldy at sunset if you have time. The gondola runs 9-4 daily from July to September. You get views of the Sawtooth and Pioneer ranges. If you fish, the Big Wood River has walk-and-wade access right through downtown Ketchum.
Saturday morning: Preflight at KSUN before 9 a.m. to beat the density altitude. Depart runway 31, climb over Galena, land at Smiley Creek by 10. Talk to the caretaker. Walk across the Boise River to the restaurant. Call ahead because their hours change. Coffee, pie, decisions.
Saturday afternoon: If proficiency and weather allow, hop into Stanley Airport (2U7) for lunch. Or push farther into Johnson Creek. If not, return to KSUN early enough to avoid afternoon thunderstorms. Both approaches are the same math. Density altitude, density altitude, density altitude.
Sunday: KSUN departure back home. Early morning, low DA, cool air, best performance of the trip.
The Trent Palmer Rule for Weekend Trips Like This
A lesson from our earlier piece on Trent Palmer’s approach to risk management keeps coming back. When Trent talks about the weekend trip that turns dangerous, he usually points to one factor. Schedule pressure. The urge to depart in weather that isn’t yours because you have to be at work Monday. On a Sun Valley fly-in that pressure is real. Plan a Monday buffer day. Rent an Airbnb an extra night. Fly out on Tuesday if the forecast is ugly. The trip that ends safely in the hangar is the one you get to repeat next summer.
Where to Sleep: On the Field, In Town, or Under the Wing
Sun Valley has three lodging models, and each has a Lane 2 case to make.
Downtown Ketchum: walkable to restaurants, bars, and the Sun Valley Company gondola base at River Run. Best if you rented a car or plan to bus. Hotel rates in July run $250-450 a night. Book a month out minimum.
Sun Valley Resort: the Lodge and the Inn are the historic properties. Rates are higher. But the resort has its own pools, ice skating (yes, in July), horseback riding, and shuttles. If you’re bringing a non-pilot spouse who wants to be entertained while you nerd out, this is your play.
Under the wing at Smiley Creek: Bring a tent and a standard airplane camping bedroll kit. You can spend the night on the strip. The caretaker will not stop you. This is the move if the point is the airplane, the campfire, and the milky way. Not the ski-town nightlife.
Gear and Aircraft: What Actually Works for Sun Valley Missions
You don’t need a bush plane to fly the Sun Valley fly-in. A stock Cessna 172 does the KSUN half without complaint. But if you plan to include Smiley Creek and points beyond, aircraft choice starts to matter.
KSUN is friendly to any piston single or twin. The 7,550-foot runway forgives high density altitude for anything you’d fly out of a 4,000-foot field. Smiley Creek is trickier. You’re on grass at 7,200 feet with only a couple thousand feet of usable strip. That’s fine for a Cessna 172 flying light. Also a Piper Cherokee two-up with half fuel. It’s easier in a Cessna 206 Stationair. You have the horsepower to accept a warm afternoon. Easiest of all in a purpose-built backcountry airplane. The aircraft in our Carbon Cub vs XCub vs Husky comparison handle U87 without a second thought.
The One Piece of Gear We’d Never Fly Sun Valley Without
A handheld VHF radio in the flight bag. Not because KSUN or U87 will fail. Because Salt Lake ARTCC frequency coverage in the Sawtooth Valley is thin at low altitudes. Losing radios while VFR at 10,500 feet over the Sawtooths is survivable. Losing radios in the KSUN pattern is not the day you want to have. The handheld is $200 of cheap insurance.
Weather and Timing: When to Book This Trip
Sun Valley’s aviation summer runs mid-June through early September. Outside that window you’re gambling with weather.
June brings unstable air and afternoon convection. Early July is peak. Long days, dry air, high pressure, morning calm. Mid-July through August brings the summer monsoon flow. More thunderstorms and higher haze. September cools off and settles down. But it shortens the flying window before dark.
The best VFR window in the day is sunrise to about 11 a.m. local. That’s the window where density altitude is manageable. Winds are light. Thunderstorm risk is lowest. By 2 p.m. the picture changes. Bumps, buildups, and gusty valley wind. Plan your KSUN-to-U87 legs in the morning window. Every summer.
Sun Valley Fly-In vs Other Idaho Backcountry Options
Deciding between Sun Valley and the deeper Idaho backcountry — Johnson Creek, Cabin Creek, Big Creek? Think about what trip you actually want. Sun Valley is a Lane 2 trip with a ski-town base. Johnson Creek is a Lane 2 trip with a camping-only base. Both are worth doing. They’re not the same weekend.
Our complete guide to Idaho backcountry airstrips covers the deep-backcountry options in detail. The short version: if this is your first Idaho trip, do Sun Valley plus Smiley Creek. If you’ve done that trip and want more, the next step is Johnson Creek. Don’t skip the Sun Valley fly-in step because the internet says the “real” backcountry is deeper. That’s how transient pilots get in trouble.
What About Alternatives if KSUN Weather Won’t Cooperate?
Have a diversion plan. Every mountain trip needs one. Twin Falls (KTWF) sits at 4,150 feet with an 8,700-foot runway. It rarely has the weather problems Sun Valley does. It sits south of the valley system. Boise (KBOI) is bigger, flatter, and always open. Both are a comfortable ferry from Ketchum. Divert, rent a car, drive up the valley for the weekend.
The mistake is treating a Sun Valley weather cancel as a “trip’s ruined” moment. It’s a divert-to-Twin-Falls-and-drive moment. Half the transient pilots we know have done that once. It’s fine. The airplane sits in Twin. You show up to Ketchum in a rental car. You fly home when the weather opens.
Frequently Asked Questions About the Sun Valley Fly-In
Is KSUN a Class D controlled airport?
Yes. Friedman Memorial (KSUN) operates as a Class D-style controlled field during summer tower hours of 0630 to 2100 local. Salt Lake ARTCC provides approach and departure via Burley RCAG on 118.05 / 363.0. Outside tower hours the airspace reverts to Class E and CTAF procedures apply.
Can I fly a Cessna 172 into Smiley Creek in July?
Yes, if you fly it light and early. A stock Cessna 172 handles U87’s grass strip fine at 7,206 feet field elevation. Plan the takeoff for cool morning hours, load light on fuel, and run the density altitude numbers before you commit. Full tanks and a hot afternoon change the answer.
What’s the best way to get from KSUN to downtown Ketchum without a rental car?
The Mountain Rides valley bus runs a summer route from Hailey through Ketchum to Sun Valley Resort. Free to riders. Walk out the Atlantic Aviation gate at KSUN, catch the bus on the main road. You’re in downtown Ketchum in about 25 minutes. It’s the move for solo pilots who don’t need wheels for the whole trip.
Related Articles
- Idaho Backcountry Airstrips: The Complete Pilot’s Guide
- Density Altitude Hot-Day Takeoff Planning for GA Pilots
- Trent Palmer’s Risk Management Lessons for GA Pilots
- Carbon Cub vs XCub vs Husky: Backcountry Comparison
- Best Fly-In Destinations for GA Pilots
