Siskiyou County
SIY · KSIY · Montague, CA · Non-towered · Print kneeboard · Open on the map
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-09-18 · night begins 07:42 PM
| Event | Local (PDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 06:25 AM | 13:25Z |
| Sunrise | 06:53 AM | 13:53Z |
| Sunset | 07:14 PM | 02:14Z |
| Evening civil twilight Loggable night begins | 07:42 PM | 02:42Z |
Plan a flight from KSIY
Past 24 hours category · wind · ceiling · visibility trends
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Density altitude today projected curve · departure window · takeoff roll
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Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Full reports: KSIY METAR decoded
Advisories
NOTAMs · Loading NOTAMs…
Pilot reports · Loading PIREPs…
Airspace hazards · Checking SIGMETs and G-AIRMETs…
Temporary flight restrictions · Checking for TFRs…
Runways
RWY 17LEFT traffic
- Heading
- 172° mag · 191° true
- Dimensions
- 7,490 × 150 ft
- TPA
- 3,700 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- Lights
- 2-light PAPI (left) (3°)
- CTAF
- 123.0
Enter the left downwind (heading 352°) on the 45° at 3,700 ft MSL (≈1,000 AGL).
More details — RWY 17
- Threshold elev
- 2,651 ft
- Markings
- nonprecision
- Approach obstacle
- Road, 15 ft, 850 ft from threshold, 0 ft B of centerline — 43:1 slope to clear
- Threshold crossing height
- 50 ft
- TDZ elevation
- 2,651 ft
- End lights
- REIL
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 17/35 | 7,490 ft |
Prefer one flat page? Full runway details for KSIY → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the KSIY kneeboard →
Comms & NavAids
Communication frequencies
Before taxi
“Antelope Mtn”Taxi & takeoff
“Antelope Mtn”Also
By procedure & sector (1 frequencies)
| Frequency | Used by |
|---|---|
| 306.3 | ANTELOPE MOUNTAIN RCAG (LOW) |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
FJS 116.25 · LMT 115.90
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| FJS · Fort Jones | VOR/DME | 116.25 · 109Y | Low | r018° / 25 NM |
| LMT · Klamath Falls | VORTAC | 115.90 · 106X | High | r219° / 39.9 NM |
Prefer one flat list? All KSIY frequencies →
Charts & procedures
Lowest minimums here: NDB · VFR sectional →
Airport info
From the field
Do you run KSIY, or an FBO, flight school, or shop on it? Claim your listing to keep fuel, fees, hours, and services current.
Airport information
- ICAO / FAA LID
- KSIY / SIY
- Coordinates
- 41.7814, -122.4681
- Elevation
- 2,651 ft MSL
- Magnetic variation
- 19E
- Sectional chart
- KLAMATH FALLS
- Airport use
- Public
- Control tower
- No
- Weather station
- ASOS · 121.125 · ☎ 530-459-0267
- ARTCC
- SEATTLE (ZSE)
- Flight service (FSS)
- RANCHO MURIETA · 122.4 · 1-800-WX-BRIEF
- NOTAM facility
- SIY
- Attendance
- ALL 0800-1700
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Landing fee
- Yes
- Activated
- 1943/09
- Distance from city
- 3 NE
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT MIRL RY 17/35, PAPI RYS 17 AND 35, REIL RYS 17 AND 35 - CTAF. on 123.0 — Chart Supplement ↗
Runway lighting aids — 17: 2-light PAPI (left) · 35: 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
- Jet A
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
- Other services
- Agricultural, Charter
Ownership & management 2 contacts
Remarks FAA · 10 notes
General
- MIGRATORY FLOCKS OF WATERFOWL IN THE VICINITY OF ARPT DURING SPRING & FALL.
- USFS FIRE OPS MAY-SEP.
- BE ALERT FOR GLIDER OPS MAY-SEP.
- SENSITIVE AG CROPS ADJACENT TO RWY/TWY. ROTOCRAFT SHOULD AVOID OPERATING IN THESE AREAS.
- WILDLIFE IN THE VICINITY OF ARPT.
- FARMING ACTIVITIES AND EQUIPMENT INVOF RWYS AND TWYS.
- FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
Lighting
- ACTVT MIRL RY 17/35, PAPI RYS 17 AND 35, REIL RYS 17 AND 35 - CTAF.
Contact
- EMAIL: AFILIPPONE@CO.SISKIYOU.CA.US
- COUNTY ARPT OFC - YREKA, 530-842-8297.
Embed KSIY weather on your site free widget for schools, clubs & FBOs
Live METAR, flight category, and favored runway for KSIY — paste this into your website's HTML. It updates automatically and stays free.
More widgets — crosswind, E6B, density altitude — on the embed page.
Nearby airports
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Also nearby: 1O5 Montague-Yreka Rohrer Field (5 NM) · CA09 Round Mountain Ranch (private) (18 NM) · O46 Weed (18 NM) · 24S Pinehurst State (20 NM) · A30 Scott Valley (22 NM) · A32 Butte Valley (23 NM)
About KSIY
Siskiyou County (SIY · KSIY) is an airport in Montague, CA, at 2,651 ft MSL. It has 1 runway, the longest 7,490 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KSIY, refreshed from the Aviation Weather Center and FAA NASR.
Does KSIY have a control tower?
No. Siskiyou County is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at KSIY?
Siskiyou County has 1 runway; the longest is 7,490 ft. See the Runways section for headings, surface, and lighting.
Where is KSIY?
Siskiyou County is in Montague, CA, at an elevation of 2,651 ft MSL. Coordinates: 41.7814, -122.4681.
More about KSIY
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 KSIY 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.
Something here wrong or out of date? Report a data problem.