Thompson Falls Airport

THM · KTHM · Thompson Falls, MT · 2,467 ft elevation · var 19E · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

ICAO / IATA: KTHM / THM
Coordinates: 47.5735, -115.2810
Elevation: 2,467 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
Beacon: white-green (SS-SR)
Segmented circle: Yes
Wind indicator: lighted
Activated: 1944/12
Distance from city: 3 SE

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	05:03 AM	11:03Z
Sunrise	05:43 AM	11:43Z
Sunset	09:42 PM	03:42Z
Evening civil twilight Loggable night begins	10:23 PM	04:23Z

Loggable night (§1.1)

10:23 PM → 05:03 AM

Night currency (§61.57)

10:42 PM → 04:43 AM

Plan a flight from KTHM

Destination (ICAO)

TAS (kt)Burn (gph)Reserve (hr)Wind from (°)Wind (kt)

Night operations

Airport lighting: SEE RMK
Rotating beacon: white-green · SS-SR
Pilot-controlled lighting: AUTOMATED UNICOM AVBL ON 118.325; 3 CLICKS.; ACTVT PAPI RWY 8 & 26; MIRL RWY 08/26 - CTAF. on 122.9 — Chart Supplement ↗

Runway lighting aids — 08: 2-light PAPI (left) · 26: 2-light PAPI (left).

FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.

Traffic pattern

Landing runway

LEFT traffic

Landing: Rwy 08 · 071°
Pattern: left (turns left)
TPA: 3,500 ft MSL (≈1,000 AGL)
CTAF: 122.9

Enter the left downwind for Rwy 08 at 3,500 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).

Runway 08/26

4,200 ft × 75 ft · Asphalt (Excellent)

Edge lights: Med. Weight bearing: Single wheel 12.5k.

Heading: 071° mag · 90° true
Markings: basic
VGSI: 2-light PAPI (left) (3°)
Traffic pattern: Left

Heading: 251° mag · 270° true
Markings: basic
VGSI: 2-light PAPI (left) (3.25°)
Traffic pattern: Left
Approach obstacle: Trees, 104 ft, 1,900 ft from threshold, 0 ft B of centerline — 16:1 slope to clear · penetrates the 20:1 visual approach surface

Will it fit? Your aircraft's required runway length (from the POH) — checked against every runway here

ft · ≥1.5× comfortable, under 1.25× tight · saved across airports

Runway	Length	Your margin
08/26	4,200 ft

Communication frequencies

Service	Frequency	Notes
CTAF	122.9

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
MLP · Mullan Pass	VOR-DME	117.80	r045° / 16.4 NM

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open KTHM on the VFR sectional (SkyVector) ↗

Services

Fuel available: 100LL
Bottled oxygen: NONE
Bulk oxygen: NONE
Airframe service: NONE
Powerplant service: NONE
Parking: tiedowns

Ownership & management

Owner

SANDERS COUNTY

PO BOX 519, THOMPSON FALLS, MT

406-827-6942

Manager

KIM ROBERTS

P.O. BOX 1204, THOMPSON FALLS, MT

406-827-3519

Remarks FAA

CONSTR PRIOR 1959
AUTOMATED UNICOM AVBL ON 118.325; 3 CLICKS.
MKD PWR LINES 7 MI E MAINLAND TO BIG IS.
PHONE ON ARPT.
100 FT SILO IN TRANS SFC NE SIDE OF RY.
WATERFOWL INVOF ARPT.
300 FT CANDLESTICK FXD DIST MKRS IN TRANS SFC.
SN REMOVAL INTMT. CALL 406-546-6384 FOR RWY COND.
FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
ACTVT PAPI RWY 8 & 26; MIRL RWY 08/26 - CTAF.
ALTN PHONE 406-546-6384 OR 406-598-6227.
FUEL AVBL 24/7 WITH CREDIT CARD.

Nearby airports

0MT7 · Pinehurst Ranch AirportPrivate (7 NM)MT69 · Littlebear AirportPrivate (12 NM)29MT · Craik AirportPrivate (13 NM)S34 · Plains Airport (16 NM)S09 · Hot Springs Airport (27 NM)MT88 · Campbell Ranch Airport (28 NM)

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 KTHM 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 KTHM

Thompson Falls Airport (THM · KTHM) is an airport in Thompson Falls, MT, at 2,467 ft MSL. It has 1 runway, the longest 4,200 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KTHM, refreshed from the Aviation Weather Center and FAA NASR.

Does KTHM have a control tower?

No. Thompson Falls Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.

What is the longest runway at KTHM?

Thompson Falls Airport has 1 runway; the longest is 4,200 ft. See the Runways tab for headings, surface, and lighting.

Where is KTHM?

Thompson Falls Airport is in Thompson Falls, MT, at an elevation of 2,467 ft MSL. Coordinates: 47.5735, -115.2810.

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