Airports / 09CL / Alta Sierra AirportGood ground coverage

📍 Grass Valley⬆ 2,275 ft1 runways

09CL ·

Alta Sierra Airport

39.11380°N

-121.05700°W

ARR / DAY

▼ 100.0%

DEP / DAY

▲ 0.0%

Alta Sierra Airport (09CL) is a small general aviation airport located in Grass Valley, CA, 28 mi north east of Roseville. It features 1 runway measuring 2,834 feet.

Safety incidents

Last 1 days · 0 total

NORMAL

Current weather

From KAUN, 11 mi away (09CL does not publish METAR)

23m ago

Temp

70°F

Wind

7 kts

220°

Visib

10+ km

Ceil

—

METAR KAUN 030155Z AUTO 22007KT 10SM OVC110 21/11 A3001 RMK A01

Runways

1 installed

2,834 FT MAX

01/19

2,834 ft × 50

ASPH-F○ unlit

Runway intelligence

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

83% of ops

74 land · 2 TO

17% of ops

15 land · 25 TO

Runway 01 carries 83% of operations (74 landings, 2 takeoffs) over the last 30 days. The next most-used is 19 at 17%.

Approach quality

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

01 74 landings

UA 31%

19 15 landings

UA 13%

Approaches to 01 show a 31% unstable-approach rate (23 UA events from 74 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

2.5

flights/day · 74 total

Busy hour (local)

5pm

also 2pm · 6pm

Day vs night

68%

06:00–20:00 local

Traffic concentrates around 5pm–6pm local, averaging 2.5 flights/day. Weekend volume runs 1.1× weekday (2.8 vs 2.5 daily).

Aircraft character

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

Activity is led by (13% of 67 flights). Top three types: , , .

Communications Frequencies

2026-06-11

Airport operations

ARTCC:: ZOA
Mag var:: 16° E

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