Airport information
- FAA LID
- 57S
- Coordinates
- 48.4802, -115.9040
- Elevation
- 2,017 ft MSL
- Magnetic variation
- 19E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SEATTLE (ZSE)
- Flight service (FSS)
- GREAT FALLS
- NOTAM facility
- GTF
- Attendance
- UNATNDD
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1940/04
- Distance from city
- 1 NW
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 | 05:00 AM | 11:00Z |
| Sunrise | 05:42 AM | 11:42Z |
| Sunset | 09:49 PM | 03:49Z |
| Evening civil twilight Loggable night begins | 10:31 PM | 04:31Z |
Plan a flight from 57S
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 14 · 139°
- Pattern
- left (turns left)
- TPA
- 3,000 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 14 at 3,000 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 14/32
3,570 ft × 30 ft · Asphalt (Poor)- Heading
- 139° mag · 158° true
- Markings
- nonstandard
- Traffic pattern
- Left
- Approach obstacle
- Trees, 80 ft, 200 ft from threshold, 0 ft B of centerline
- Displaced threshold
- 825 ft
- Heading
- 319° mag · 338° true
- Markings
- nonstandard
- Traffic pattern
- Right
- Approach obstacle
- Trees, 69 ft, 445 ft from threshold, 0 ft L/R of centerline — 3:1 slope to clear · penetrates the 20:1 visual approach surface
- Displaced threshold
- 780 ft
| Runway | Length | Your margin |
|---|---|---|
| 14/32 | 3,570 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
- LGTD HELI ADJ TO SEGMENTED CIRCLE.
- NO SNOW REMOVAL. ARPT SFC COND UNMON.
- PEDESTRIAN WALKING TRAIL INVOF MOV AREA.
- FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
- LINCOLN COUNTY.
- WINTER - 406-295-4693.
- +5-80 FT TREES WI PRI SFC BGN 25-200 FT FT FM RWY END BOTH SIDES.
- +5 FT FENCE 13 FT FM RWY END BOTH SIDES.
- DTHR MKD WITH WHITE ARROWS.
- DTHR MKD WITH WHITE ARROWS.
- CTLG OBSTN EXCEEDS A 45 DEG SLP. APCH SLP 16:1 FM DTHR.
- APCH SLP 13:1 FM DTHR.
- CRACKS, WEEDS, BROKEN ASPH.
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 57S 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 57S
Troy Airport (57S) is an airport in Troy, MT, at 2,017 ft MSL. It has 1 runway, the longest 3,570 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 57S, refreshed from the Aviation Weather Center and FAA NASR.
Does 57S have a control tower?
No. Troy Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 57S?
Troy Airport has 1 runway; the longest is 3,570 ft. See the Runways tab for headings, surface, and lighting.
Where is 57S?
Troy Airport is in Troy, MT, at an elevation of 2,017 ft MSL. Coordinates: 48.4802, -115.9040.
Fly out of 57S often?
Save 57S 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.