Illinois Valley Airport

3S4 · Cave Junction, OR · 1,394 ft elevation · var 18E · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

FAA LID: 3S4
Coordinates: 42.1037, -123.6820
Elevation: 1,394 ft MSL
Magnetic variation: 18E
Sectional chart: KLAMATH FALLS
Airport use: Public
Control tower: No
ARTCC: SEATTLE (ZSE)
Flight service (FSS): MC MINNVILLE
NOTAM facility: MMV
Attendance: M-F 0800-1700
Beacon: white-green (SS-SR)
Segmented circle: Yes
Wind indicator: lighted
Activated: 1945/09
Distance from city: 4 SW

Weather

METAR observed

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TAF forecast

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Sun & FAA night 2026-06-21

Event	Local (PDT)	UTC
Morning civil twilight Loggable night ends	05:04 AM	12:04Z
Sunrise	05:39 AM	12:39Z
Sunset	08:54 PM	03:54Z
Evening civil twilight Loggable night begins	09:29 PM	04:29Z

Loggable night (§1.1)

09:29 PM → 05:04 AM

Night currency (§61.57)

09:54 PM → 04:39 AM

Plan a flight from 3S4

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. ADZY ALSO AVBL BY CALLING 617-262-3825.; ACTVT REIL 18 & 36; MIRL RWY 18/36 - CTAF. on 122.9 — Chart Supplement ↗

Runway lighting aids — 18: 2-light PAPI (left) · 36: 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 18 · 179°
Pattern: left (turns left)
TPA: 2,400 ft MSL (≈1,000 AGL)
CTAF: 122.9

Enter the left downwind for Rwy 18 at 2,400 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).

Runway 18/36

4,807 ft × 60 ft · Asphalt (Good)

Edge lights: Med. Weight bearing: Single wheel 20k, Double wheel 30k.

Heading: 179° mag · 197° true
Markings: basic
VGSI: 2-light PAPI (left) (4°)
Traffic pattern: Left
Approach obstacle: Road, 15 ft, 260 ft from threshold, 170 ft B of centerline — 4:1 slope to clear · penetrates the 20:1 visual approach surface
Displaced threshold: 125 ft

Heading: 359° mag · 17° true
Markings: basic
VGSI: 2-light PAPI (left) (4°)
Traffic pattern: Left
Approach obstacle: Trees, 54 ft, 928 ft from threshold, 113 ft R of centerline — 13:1 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
18/36	4,807 ft

Communication frequencies

Service	Frequency	Notes
UNIC	122.8	CTAF/UNICOM

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
CEC · Crescent City	VORTAC	109.00	r033° / 31.7 NM

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open 3S4 on the VFR sectional (SkyVector) ↗

Services

Bottled oxygen: NONE
Bulk oxygen: NONE
Airframe service: NONE
Powerplant service: NONE
Parking: tiedowns
Other services: Instruction

Ownership & management

Owner

JOSEPHINE COUNTY AIRPORTS

1441 BROOKSIDE BLVD, GRANTS PASS, OR

541-955-4535

Manager

MICHAEL CRISAFULLI

1441 BROOKSIDE BLVD, GRANTS PASS, OR

541-955-4535

Remarks FAA

ESTABD PRIOR TO 1959.
AUTOMATED UNICOM. ADZY ALSO AVBL BY CALLING 617-262-3825.
(E94) USFS WX STN.
RY 36 DESIGNATED CALM WIND RY.
FREQUENT ULTRA-LIGHT ACTIVITY.
RWY HAS BASIC MARKINGS WITH SIDE STRIPES
FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
4 FT BRUSH IN PRI SFC AREA.
ACTVT REIL 18 & 36; MIRL RWY 18/36 - CTAF.
MIRL SET 1 FT OFF RWY EDGE
RWY 18 14:1 BASED ON DTHR. RWY 18 15 FT ROAD AT 330 FT ON CL 22:1 BASED ON DTHR

Nearby airports

84OR · B Bar Ranch AirportPrivate (10 NM)5OR0 · Backachers Ranch AirportPrivate (13 NM)6OR6 · Wonder AirportPrivate (17 NM)0O9 · Ward Field (21 NM)36S · Happy Camp Airport (23 NM)KBOK · Brookings Airport (27 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 3S4 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 3S4

Illinois Valley Airport (3S4) is an airport in Cave Junction, OR, at 1,394 ft MSL. It has 1 runway, the longest 4,807 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 3S4, refreshed from the Aviation Weather Center and FAA NASR.

Does 3S4 have a control tower?

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

What is the longest runway at 3S4?

Illinois Valley Airport has 1 runway; the longest is 4,807 ft. See the Runways tab for headings, surface, and lighting.

Where is 3S4?

Illinois Valley Airport is in Cave Junction, OR, at an elevation of 1,394 ft MSL. Coordinates: 42.1037, -123.6820.

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