Airport information
- FAA LID
- 3U7
- Coordinates
- 47.4809, -112.8709
- Elevation
- 5,434 ft MSL
- Magnetic variation
- 18E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS
- NOTAM facility
- GTF
- Attendance
- UNATNDD
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1965/03
- Distance from city
- 19 W
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:54 AM | 10:54Z |
| Sunrise | 05:34 AM | 11:34Z |
| Sunset | 09:32 PM | 03:32Z |
| Evening civil twilight Loggable night begins | 10:13 PM | 04:13Z |
Plan a flight from 3U7
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 12 · 122°
- Pattern
- left (turns left)
- TPA
- 6,400 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 12 at 6,400 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 12/30
6,000 ft × 100 ft · Asphalt (Poor)- Heading
- 122° mag · 140° true
- Markings
- basic
- Traffic pattern
- Left
- Approach obstacle
- Trees, 39 ft, 372 ft from threshold, 0 ft B of centerline — 4:1 slope to clear · penetrates the 20:1 visual approach surface
- Heading
- 302° mag · 320° true
- Markings
- basic
- Traffic pattern
- Left
- Approach obstacle
- Trees, 41 ft, 461 ft from threshold, 0 ft B of centerline — 6:1 slope to clear · penetrates the 20:1 visual approach surface
| Runway | Length | Your margin |
|---|---|---|
| 12/30 | 6,000 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| CTAF | 122.9 |
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Parking
- tiedowns
Ownership & management
Remarks FAA
- WI LEWIS & CLARK NATIONAL FOREST.
- SNOW REMOVAL NA.
- MTS PARL E & W; IN TRSN SFC.
- SVCS NA.
- FONE NA; CABIN 1 MI NW.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
- 3 WDI; BOTH ENDS & MIDPT.
- PSBL MOD-SVR CROSSWIND & TURB.
- RISES UPHILL 120 FT; RISING TRRN BYD.
- RCMDD DEP COND PMTG.
- +58 FT TREES ON CNTRLN.
- +250 FT TREES ON CNTRLN.
- 33:1 TO THR. +65 FT TREES 0-150 FT R 2150 FT FM RWY END.
- LRG CRACKS & WEEDS FULL LEN.
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 3U7 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 3U7
Benchmark Airport (3U7) is an airport in Augusta, MT, at 5,434 ft MSL. It has 1 runway, the longest 6,000 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 3U7, refreshed from the Aviation Weather Center and FAA NASR.
Does 3U7 have a control tower?
No. Benchmark Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 3U7?
Benchmark Airport has 1 runway; the longest is 6,000 ft. See the Runways tab for headings, surface, and lighting.
Where is 3U7?
Benchmark Airport is in Augusta, MT, at an elevation of 5,434 ft MSL. Coordinates: 47.4809, -112.8709.
Fly out of 3U7 often?
Save 3U7 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.