📍 Portland-Mulino⬆ 260 ft1 runways

K4S9 ·

Portland Mulino Airport

45.21630°N

-122.59000°W

ARR / DAY

▼ 1.7%

DEP / DAY

▲ 37.0%

Portland Mulino Airport (K4S9) is a small general aviation airport located in Portland-Mulino, OR, 21 mi south of Gresham. It features 1 runway measuring 3,600 feet. SkyMeter has observed roughly 8 arrivals and 11 departures per day on average over the last 7 days.

Safety incidents

Last 7 days · 0 total

NORMAL

Current weather

From KUAO, 9 mi away (K4S9 does not publish METAR)

22m ago

Temp

58°F

Wind

5 kts

10°

Visib

10+ km

Ceil

—

KUAO 200153Z 01005KT 10SM CLR 14/04 A2994 RMK AO2 SLP137 T01440039

Runways

1 installed

3,600 FT MAX

14/32

3,600 ft × 100

ASP● LITMED

Runway intelligence

Which runway carries the operations, observed over the last 30 days

71% of ops

302 land · 439 TO

29% of ops

122 land · 16 TO

Runway 32 carries 71% of operations (302 landings, 439 takeoffs) over the last 30 days. The next most-used is 14 at 29%.

Approach quality

Per-runway unstable-approach, go-around, and long-rollout rates

32 302 landings

UA 8%

14 122 landings

UA 15%

Approaches to 32 show a 8% unstable-approach rate (24 UA events from 302 landings).Phase B will add wind-correlation: which crosswind band produces most UA events.

Traffic behavior

When the field is busy: hourly + weekday vs weekend

Daily avg

17.7

flights/day · 532 total

Busy hour (local)

9pm

also 12am · 6pm

Day vs night

42%

06:00–20:00 local

Traffic concentrates around 6pm–9pm local, averaging 17.7 flights/day. Weekend volume runs 1.2× weekday (21.0 vs 17.3 daily).

Aircraft character

What's actually flying here: top types over the last 30 days

Activity is led by (23% of 433 flights). Top three types: , , .

Communications Frequencies

2026-06-11

Type	Freq (MHz)	Hours
CTAF	123.050	—
UNICOM	123.050	—
CD/P	119.950	—
OTHER	119.950	—

Airport operations

ARTCC:: ZSE
Mag var:: 19° E
Fuel:: 100LL

Hourly traffic

Avg movements per hour · local time · last 30 days

Custom date range