Edgar G Obie Airport

S71 · Chinook, MT · 2,416 ft elevation · var 16E · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

FAA LID: S71
Coordinates: 48.5921, -109.2510
Elevation: 2,416 ft MSL
Magnetic variation: 16E
Sectional chart: GREAT FALLS
Airport use: Public
Control tower: No
Weather station: AWOS-AV · 118.35 · ☎ 406-357-3453
ARTCC: SALT LAKE CITY (ZLC)
Flight service (FSS): GREAT FALLS
NOTAM facility: GTF
Attendance: ALL 0700-1900
Beacon: white-green (SS-SR)
Segmented circle: Yes
Wind indicator: lighted
Activated: 1947/12
Distance from city: 1 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	04:32 AM	10:32Z
Sunrise	05:15 AM	11:15Z
Sunset	09:23 PM	03:23Z
Evening civil twilight Loggable night begins	10:05 PM	04:05Z

Loggable night (§1.1)

10:05 PM → 04:32 AM

Night currency (§61.57)

10:23 PM → 04:15 AM

Plan a flight from S71

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: ACTVT PAPI RWY 26; MIRL RWY 08/26 DAWN-DUSK - CTAF. AFTER DUSK MIRL ON CONSLY TIL DAWN. on 122.8 — Chart Supplement ↗

Runway lighting aids — 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 · 084°
Pattern: left (turns left)
TPA: 3,216 ft MSL · 800 AGL
CTAF: 122.8

Enter the left downwind for Rwy 08 at 3,216 ft MSL · 800 AGL on a 45°.

Runway 08/26

4,000 ft × 75 ft · Asphalt (Excellent)

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

Heading: 084° mag · 100° true
Threshold elev: 2,416 ft
Markings: basic
Traffic pattern: Left
TDZ elevation: 2,416 ft

Heading: 264° mag · 280° true
Threshold elev: 2,409 ft
Markings: basic
VGSI: 2-light PAPI (left) (4°)
Traffic pattern: Left
Threshold crossing height: 37 ft
TDZ elevation: 2,410 ft

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	4,000 ft

Communication frequencies

Tower & ground

ASOS/AWOS	118.35
CTAF	122.8
UNICOM	122.8

Source: FAA NASR (current 28-day cycle).

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
HVR · Havre	VOR-DME	111.80	r065° / 20.9 NM

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open S71 on the VFR sectional (SkyVector) ↗

Services

Fuel available: 100LL
Bottled oxygen: NONE
Bulk oxygen: NONE
Airframe service: MINOR
Powerplant service: MINOR
Parking: tiedowns
Other services: Agricultural, Charter, Instruction

Ownership & management

Owner

BLAINE CO. ARPT. COMM.

PO BOX 248, CHINOOK, MT

406-357-3250

Manager

EDGAR OBIE JR.

490 CLEVELAND RD, CHINOOK, MT

(406) 799-6516

Remarks FAA

EXISTED PRIOR TO 05/15/59.
FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
226 FT AGL SMOKE STACK 1.1 MI FM 26 THR.
ACTVT PAPI RWY 26; MIRL RWY 08/26 DAWN-DUSK - CTAF. AFTER DUSK MIRL ON CONSLY TIL DAWN.
CELL 406-799-6516
SELF SERVICE CREDIT CARD 24/7

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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 S71 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 S71

Edgar G Obie Airport (S71) is an airport in Chinook, MT, at 2,416 ft MSL. It has 1 runway, the longest 4,000 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for S71, refreshed from the Aviation Weather Center and FAA NASR.

Does S71 have a control tower?

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

What is the longest runway at S71?

Edgar G Obie Airport has 1 runway; the longest is 4,000 ft. See the Runways tab for headings, surface, and lighting.

Where is S71?

Edgar G Obie Airport is in Chinook, MT, at an elevation of 2,416 ft MSL. Coordinates: 48.5921, -109.2510.

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