Airport information
- FAA LID
- 3U1
- Coordinates
- 45.2678, -115.6831
- Elevation
- 5,896 ft MSL
- Magnetic variation
- 18E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- BOISE
- NOTAM facility
- BOI
- Attendance
- UNATNDD
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1947/08
- Distance from city
- 0 NW
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (PDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:17 AM | 11:17Z |
| Sunrise | 04:55 AM | 11:55Z |
| Sunset | 08:34 PM | 03:34Z |
| Evening civil twilight Loggable night begins | 09:12 PM | 04:12Z |
Plan a flight from 3U1
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.9 — confirm the click sequence in the Chart Supplement ↗
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 11
- Pattern
- left (turns left)
- TPA
- 6,900 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 11 at 6,900 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 11/29
2,765 ft × 50 ft · DIRT-G- Heading
- n/a
- Heading
- n/a
| Runway | Length | Your margin |
|---|---|---|
| 11/29 | 2,765 ft |
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| DNJ · Donnelly | VORTAC | 116.20 | r017° / 37.4 NM |
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
Ownership & management
Remarks FAA
- ESTABD PRIOR TO 1959.
- RECOMMENDED USE EARLY MORNING & LATE EVENING IN SUMMER. NOT RECOMMENDED FOR INEXPERIENCED PILOTS.
- NO WINTER MAINTENANCE.
- DWNDFTS PREVALENT RWY 12 SUMMER MONTHS.
- NO TELEPHONE AVBL AT ARPT.
- ROAD CROSSES RY APRXLY 800 FT FM RY 12 THLD.
- RWY 12 +4 FT DREDGE TAILINGS 0 FT, 65 FT R; +4 FT DREDGE TAILINGS 350 FT ON CNTRLN; +70 FT TREES AT 600 FT ON CTRLN; +200 FT RDG AT 1000 FT ON CNTRLN.
- RWY 30 +25 FT BLDG AT 70 FT, 85 FT L; +10 FT BLDG AT 130 FT, 70 FT L; +10 FT PVT ROAD AT 130 FT, 35 FT L; +5 FT LOG FENCE AT 100 FT, 25 FT L.
- DO NOT USE ADJACENT PVT ROAD SW OF RWY FOR TAKE OFF OR LANDING.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
- RCMD LND RWY 12 & TKOF RWY 30 WHEN WND CONDS ALLOW.
- RWY 12 THR MKD WITH NON-STD W ROCK BDRY MKRS.
- RWY 30 THLD POORLY DEFINED.
- 15 FT ROAD AT O FT, 60 FT RIGHT - MAIN ACES ROAD INTO WARREN.
- HAS SOME LOOSE ROCKS TO 2 INCHES IN DIAM; ISOLATED SPOTS OF EMBEDDED FLAT ROCKS TO 6 INCHES IN DIAM; AND SOME SPOTTY WEED GROWTH TO 12 INCHES.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 3U1 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About 3U1
Warren USFS Airport (3U1) is an airport in Warren, ID, at 5,896 ft MSL. It has 1 runway, the longest 2,765 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 3U1, refreshed from the Aviation Weather Center and FAA NASR.
Does 3U1 have a control tower?
No. Warren USFS Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 3U1?
Warren USFS Airport has 1 runway; the longest is 2,765 ft. See the Runways tab for headings, surface, and lighting.
Where is 3U1?
Warren USFS Airport is in Warren, ID, at an elevation of 5,896 ft MSL. Coordinates: 45.2678, -115.6831.
Fly out of 3U1 often?
Save 3U1 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.