Greenwood Lake Airport
4N1 · West Milford, NJ · Non-towered · Print kneeboard
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-04 · night begins 08:41 PM
| Event | Local (EDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:25 AM | 09:25Z |
| Sunrise | 05:56 AM | 09:56Z |
| Sunset | 08:11 PM | 00:11Z |
| Evening civil twilight Loggable night begins | 08:41 PM | 00:41Z |
Plan a flight from 4N1
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 24LEFT traffic
- Heading
- 241° mag · 228° true
- Dimensions
- 3,471 × 60 ft
- TPA
- 1,800 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- Lights
- 2-light PAPI (left) (3.5°)
- CTAF
- 122.9
Enter the left downwind (heading 061°) on the 45° at 1,800 ft MSL (≈1,000 AGL).
More details — RWY 24
- Threshold elev
- 789 ft
- Markings
- nonprecision
- Approach obstacle
- Tree, 23 ft, 680 ft from threshold, 132 ft L of centerline — 20:1 slope to clear
- Threshold crossing height
- 44 ft
- TDZ elevation
- 790 ft
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 06/24 | 3,471 ft |
Prefer one flat page? Full runway details for 4N1 → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 4N1 kneeboard →
Comms & NavAids
Communication frequencies
Taxi & takeoff
Departure & arrival
“Newark”ATC assigns the exact frequency (in your clearance or on handoff) — which one depends on your SID (departing) or STAR (arriving).
By procedure & sector (1 frequencies)
| Frequency | Used by |
|---|---|
| 379.9 | APCH/P DEP/P |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
SAX 115.70 · HUO 116.10 · TEB 108.40 · +4
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| SAX · Sparta | VORTAC | 115.70 · 104X | High | r078° / 9.4 NM |
| HUO · Huguenot | VOR/DME | 116.10 · 108X | High | r158° / 20.2 NM |
| TEB · Teterboro | VOR/DME | 108.40 · 21X | Terminal | r334° / 21.2 NM |
| STW · Stillwater | VOR/DME | 109.60 · 33X | Low | r082° / 24.9 NM |
| BWZ · Broadway | VOR/DME | 114.20 · 89X | Low | r058° / 29.3 NM |
| LGA · La Guardia | VOR/DME | 113.10 · 78X | Low | r326° / 30 NM |
| CMK · Carmel | VOR/DME | 116.60 · 113X | Low | r267° / 35.8 NM |
Prefer one flat list? All 4N1 frequencies →
Charts & procedures
Airport info
Airport information
- FAA LID
- 4N1
- Coordinates
- 41.1282, -74.3467
- Elevation
- 790 ft MSL
- Magnetic variation
- 13W
- Sectional chart
- NEW YORK
- Airport use
- Public
- Control tower
- No
- ARTCC
- NEW YORK (ZNY)
- Flight service (FSS)
- MILLVILLE · 122.2 · 1-800-WX-BRIEF
- NOTAM facility
- MIV
- Attendance
- ALL 0800-1700
- Beacon
- white-green (SS-SR)
- Segmented circle
- No
- Wind indicator
- lighted
- Activated
- 1960/06
- Distance from city
- 1 E
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- AUTOMATED UNICOM; 3 CLICKS TO ACTVT.; ACTVT MIRL RWY 06/24 - CTAF, 5 CLICKS. PAPI RWY 24 OPR CONSLY. on 122.9 — Chart Supplement ↗
Runway lighting aids — 24: 2-light PAPI (left).
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
- Fuel available
- 100LL, Jet A
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- MAJOR
- Powerplant service
- MAJOR
- Parking
- tiedowns
- Other services
- Air ambulance, Instruction, Parachute ops, Rental, Aircraft sales
Ownership & management 2 contacts
Remarks FAA · 8 notes
General
- RY 06/24 STEEP ROCK LEDGES LCTD JUST BYD BOTH RY ENDS.
- ARPT SUBJECT TO GUSTING WIND & FREQUENT CROSSWINDS.
- SOME RWY AND TWY LGTS TALLER THAN STANDARD.
- DEER AND BIRDS ON AND INVOF ARPT.
- FOR CD CTC NEWARK APCH AT 800-645-3206.
- DROP ZONE LCTD SE SIDE OF RWY.
Lighting
- ACTVT MIRL RWY 06/24 - CTAF, 5 CLICKS. PAPI RWY 24 OPR CONSLY.
Obstructions
- TREES BELOW RWY END, CLIFF.
Nearby airports
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Also nearby: JY43 Hill Top Airport (private) (3 NM) · N72 Warwick Municipal Airport (10 NM) · N07 Lincoln Park Airport (11 NM) · 4NY1 Orange Poultry Farm Airport (12 NM) · 5NY7 Rolling Hills Airport (12 NM) · NK07 Big Island Airport (12 NM)
About 4N1
Greenwood Lake Airport (4N1) is an airport in West Milford, NJ, at 790 ft MSL. It has 1 runway, the longest 3,471 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4N1, refreshed from the Aviation Weather Center and FAA NASR.
Does 4N1 have a control tower?
No. Greenwood Lake Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at 4N1?
Greenwood Lake Airport has 1 runway; the longest is 3,471 ft. See the Runways section for headings, surface, and lighting.
Where is 4N1?
Greenwood Lake Airport is in West Milford, NJ, at an elevation of 790 ft MSL. Coordinates: 41.1282, -74.3467.
Fly out of 4N1 often?
Save 4N1 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.
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 4N1 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.