1
Runway
2
Frequencies
0
Procedures
1
NOTAM
Quick Facts
ICAO
K4S9
FAA
4S9
Elevation
260 ft MSL
Runways
1
Frequencies
2
Tower
No
Fuel
N/A
Coordinates
45.216, -122.590
Airport Information
Facility Type
AIRPORT
Elevation
260 ft MSL
Control Tower
No
Fuel Types
None listed
Coordinates
45.2163, -122.5900
Current Weather
SPECI KUAO 131930Z 23007KT 10SM SCT029 BKN036 OVC045 13/09 A3013 RMK AO2 RAB19E28 P0000 T01330094
Flight Category
VFR
Wind
230° at 7 kt
Visibility
10+ SM
Temperature
13.3°C
Dewpoint
9.4°C
Altimeter
1020.40 inHg
Cloud Cover
OVC
Nearest weather from KUAO (11 NM away)
Observed 2026-05-13 19:30Z
Nearby Weather Cameras
No camera at K4S9. Showing nearest cameras.
Cooper
North · Camera 1 · 2 cameras total
22 NM away
McCully Mtn
East · Camera 2 · 4 cameras total
27 NM away
10 camera angles available
See all cameras, directions, and nearby airport cameras
Sign up free to view all cameras →Runways
| ID | Length | Width | Surface | Lights |
|---|---|---|---|---|
| 14/32 | 3,425 ft | 100 ft | ASP | - |
Frequencies
| Type | Frequency | Name |
|---|---|---|
| CLD | 119.95 | CLD |
| UNIC | 123.05 | CTAF/UNICOM |
Active NOTAMs
4S9 26/103
2026-05-13 14:45 – 2026-05-14 23:00
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ENTERPRISE
- null — Adrian Airfield
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Oregon airports
K4S9 Operational Overview
Location & Facility
Portland Mulino Airport (K4S9) is a airport located in Portland-Mulino, Oregon, United States. The field sits at an elevation of 260 feet above mean sea level (MSL) at coordinates 45.2163°N, 122.5900°W.
Runways
Portland Mulino Airport has 1 runway. The longest runway (14/32) measures 3,425 feet by 100 feet with a asp surface.
Communications & Operations
Portland Mulino Airport is a non-towered (pilot-controlled) field. A total of 2 communication frequencies are published for this facility.
Weather Cameras
3 FAA Weather Cameras are available near Portland Mulino Airport, providing real-time visual weather conditions updated every 10 minutes. AeroCopilot integrates these cameras with AI-powered weather analysis to help pilots assess visibility and ceiling conditions before departure.
Current Conditions
The current flight category at Portland Mulino Airport is VFR (Visual Flight Rules — good flying conditions). Weather conditions are updated in real-time from official NOAA Aviation Weather Center observations. There is currently 1 active NOTAM for this facility.
Frequently Asked Questions
What is K4S9?
K4S9 is the ICAO identifier for Portland Mulino Airport, a public-use airport located in Portland-Mulino, Oregon, United States.
How many runways does Portland Mulino Airport have?
Portland Mulino Airport (K4S9) has 1 runway. See the runway table above for dimensions and surface types.
What is the elevation of K4S9?
The field elevation of Portland Mulino Airport is 260 feet above mean sea level (MSL).
Is fuel available at K4S9?
No fuel types are currently listed for Portland Mulino Airport. Contact the FBO directly for availability.
What are the current weather conditions at K4S9?
The current flight category at Portland Mulino Airport is VFR. See the METAR section above for full decoded weather data including wind, visibility, temperature, and altimeter.
Are there active NOTAMs at K4S9?
There are currently 1 active NOTAM for Portland Mulino Airport. Sign up for AeroCopilot to read decoded NOTAM text and AI interpretations.
How do I access complete data for K4S9?
Sign up for a free AeroCopilot account to access all frequencies, full NOTAM text with AI interpretation, decoded forecasts, and IFR procedure charts for Portland Mulino Airport.
Where is Portland Mulino Airport located?
Portland Mulino Airport (K4S9) is located in Portland-Mulino, Oregon, United States, at an elevation of 260 ft MSL.
Does K4S9 have weather cameras?
K4S9 does not have a direct weather camera, but there are nearby cameras within range. Sign up for AeroCopilot to view all nearby airport cameras.