Garrison Dam Recreational Airpark

37N · Riverdale, ND · Non-towered · Print kneeboard

Elevation

1,723 ft MSL

Longest runway

3,195 ft 11/29

Runway

Mag var

10E

CTAF 122.9

Nearby now

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Weather

METAR observed

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TAF forecast

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Sun & FAA night2026-08-04 · night begins 09:51 PM

Event	Local (CDT)	UTC
Morning civil twilight Loggable night ends	05:52 AM	10:52Z
Sunrise	06:27 AM	11:27Z
Sunset	09:16 PM	02:16Z
Evening civil twilight Loggable night begins	09:51 PM	02:51Z

Loggable night (§1.1)

09:51 PM → 05:52 AM

Night currency (§61.57)

10:16 PM → 05:27 AM

Plan a flight from 37N

Destination

TAS (kt)Burn (gph)Reserve (hr)Cruise (ft)Max alt (ft)Wind from (°)Wind (kt)

Winds aloft NOAA forecast · 3,000 to 53,000 ft

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Advisories

NOTAMs

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Pilot reports

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Airspace hazards

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Runways

RWY 11RIGHT trafficRP · charted

Heading: 112° mag · 122° true
Dimensions: 3,195 × 60 ft
TPA: 2,700 ft MSL (≈1,000 AGL) · standard
Surface: TURF-GRVL
CTAF: 122.9

Enter the right downwind (heading 292°) on the 45° at 2,700 ft MSL (≈1,000 AGL).

More details — RWY 11

Threshold elev: 1,719 ft
Markings: nonstandard
Approach obstacle: Trees, 50 ft, 625 ft from threshold, 100 ft L/R of centerline — 12:1 slope to clear · penetrates the 20:1 visual approach surface

Condition: Fair. Weight bearing: Single wheel 4k.

Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates

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
11/29	3,195 ft

Prefer one flat page? Full runway details for 37N → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 37N kneeboard →

Comms & NavAids

Communication frequencies

Taxi & takeoff

CTAF

122.9

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

Prefer one flat list? All 37N frequencies →

Charts & procedures

PDF ↗

Chart Supplement ↗

VFR sectional →

Airport info

Airport information

FAA LID: 37N
Coordinates: 47.4831, -101.4090
Elevation: 1,723 ft MSL
Magnetic variation: 10E
Sectional chart: BILLINGS
Airport use: Public
Control tower: No
ARTCC: MINNEAPOLIS (ZMP)
Flight service (FSS): GRAND FORKS · 122.2 · 1-800-WX-BRIEF
NOTAM facility: GFK
Attendance: UNATNDD
Segmented circle: Yes
Wind indicator: yes
Activated: 1984/11
Distance from city: 1 SW

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 under Sun & FAA night in the Weather section.

Services fuel · repairs · oxygen · attendance

Parking: tiedowns

Ownership & management 2 contacts

Owner

US ARMY CORPS OF ENGINEERS

OMAHA DIST 6014 US POST OFC, OMAHA, NE

701-654-7411

Manager

KYLE WANNER

PO BOX 5020, BISMARCK, ND

701-328-9650

Remarks FAA · 16 notes

General

ARPT CLSD OCT-MAY; ARPT SFCS SOFT WHEN WET. NO SNOW REMOVAL AVBL.
RY 11 -30 FT DROP OFF 450 FT FM THLD.
DEER & BIRDS ON & INVOF ARPT.
RY 29 -5 FT DROP OFF 420 FT FM THLD.
RY 11/29 +15 FT DIRT TRAIL 40 FT FM CNTRLN ON N SIDE OF RY 500 FT INBOUND RY 11 THLD.
FOR CD CTC MINNEAPOLIS ARTCC AT 651-463-5588.

Runways

SFC LMTD TO USE ONLY BY ACFT GWT UNDER 4000 LBS.
400' DIRT/GRAVEL STWY BOTH ENDS.
RWY 11/29 NSTD MKGS; EDGES & THLDS MKD WITH BLACK/WHITE CONES.
NUMEROUS SMALL GRAVEL/ROCKS ON SFC.

Obstructions

+3' HILL 500' FM RY END 100' R OF EXTDD CL.
-3' ROAD 463' FM RY END ON EXTDD RY CL.

Contact

DIRECTOR OF NORTH DAKOTA AERONAUTICS COMMISSION
LAND LEASED BY ND AERO CMSN, PO BOX 5020, BISMARCK, ND 58502.
PHONE ATTENDANCE AVBL MON-FRI 0800-1700. AFT HRS CELL 701-425-5926 OR 701-955-8280.
PHONE OF THE LOCAL CORPS OF ENGRS, RIVERDALE DIST OFC.

Nearby airports

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Also nearby: NA90 Circle Z Landing Strip (8 NM) · D05 Garrison Municipal Airport (10 NM) · ND44 Underwood Airport (private) (11 NM) · ND22 Fischer Private Airport (private) (14 NM) · 5C8 Washburn Municipal Airport (17 NM)

About 37N

Garrison Dam Recreational Airpark (37N) is an airport in Riverdale, ND, at 1,723 ft MSL. It has 1 runway, the longest 3,195 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 37N, refreshed from the Aviation Weather Center and FAA NASR.

Does 37N have a control tower?

No. Garrison Dam Recreational Airpark is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.

What is the longest runway at 37N?

Garrison Dam Recreational Airpark has 1 runway; the longest is 3,195 ft. See the Runways section for headings, surface, and lighting.

Where is 37N?

Garrison Dam Recreational Airpark is in Riverdale, ND, at an elevation of 1,723 ft MSL. Coordinates: 47.4831, -101.4090.

Fly out of 37N often?

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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 37N 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.