Airport information
- FAA LID
- 23S
- Coordinates
- 47.1791, -113.4450
- Elevation
- 4,235 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
- Beacon
- white (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1964/08
- Distance from city
- 2 E
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 | 04:58 AM | 10:58Z |
| Sunrise | 05:38 AM | 11:38Z |
| Sunset | 09:33 PM | 03:33Z |
| Evening civil twilight Loggable night begins | 10:13 PM | 04:13Z |
Plan a flight from 23S
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white · SS-SR
- 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 16 · 162°
- Pattern
- left (turns left)
- TPA
- 5,200 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 16 at 5,200 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 16/34
4,575 ft × 75 ft · Turf (Excellent)- Heading
- 162° mag · 180° true
- Traffic pattern
- Left
- Approach obstacle
- Trees, 50 ft, 350 ft from threshold — 7:1 slope to clear · penetrates the 20:1 visual approach surface
- Heading
- 342° mag · 0° true
- Traffic pattern
- Left
| Runway | Length | Your margin |
|---|---|---|
| 16/34 | 4,575 ft |
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| MSO · Missoula | VOR-DME | 112.80 | r041° / 30.8 NM |
| DRU · Drummond | VOR | 117.10 | r325° / 34.3 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
- TKOFS TO N NOT RECOMMENDED DUE TO RISING TRRN.
- TREES IN TRANSITIONAL SFC FULL RWY LEN BOTH SIDES.
- BIRDS & WILDLIFE ON & INVOF ARPT.
- SNOW REMOVAL INTMT, CALL AMGR FOR CURRENT CONDS 406-444-2506.
- RWY 34 HAS 1150 FT OVRN AVBL FOR TKOF AND LDG.
- CREW CAR AVBL.
- FOR CD CTC SPOKANE APCH AT 509-742-2522, WHEN APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568
- RWY 16 DTHR 311 FT FM RWY END FOR 20:1 APCH SLP MKD WITH DBL W CONES.
- RWY 34 SOLAR LGTS FIRST 2/3 OF RWY - SUMMER MONTHS ONLY
- RWY 16 MKD FULL LEN WITH W CONES & REFLECTIVE TAPE - SUMMER MONTHS ONLY
- RWY 34 MKD FULL LEN WITH W CONES & REFLECTIVE TAPE - SUMMER MONTHS ONLY.
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 23S 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 23S
Seeley Lake Airport (23S) is an airport in Seeley Lake, MT, at 4,235 ft MSL. It has 1 runway, the longest 4,575 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 23S, refreshed from the Aviation Weather Center and FAA NASR.
Does 23S have a control tower?
No. Seeley Lake Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 23S?
Seeley Lake Airport has 1 runway; the longest is 4,575 ft. See the Runways tab for headings, surface, and lighting.
Where is 23S?
Seeley Lake Airport is in Seeley Lake, MT, at an elevation of 4,235 ft MSL. Coordinates: 47.1791, -113.4450.
Fly out of 23S often?
Save 23S 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.