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

▼ 23.1%

DEP / DAY

▼ 40.0%

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 3,000 feet. SkyMeter has observed roughly 1 arrivals and 1 departures per day on average over the last 7 days.

Safety incidents

Last 7 days · 1 total

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Current weather

From KBAB, 20 mi away (09CL does not publish METAR)

52m ago

Temp

70°F

Wind

10 kts

170°

Visib

10+ km

Ceil

—

KBAB 032055Z 17010KT 10SM OVC045 21/14 A2990 RMK AO2A SLP128 T02120143 57011 CHINO RWY33 $

Runways

1 installed

3,000 FT MAX

01/19

3,000 ft × 50

ASPH-F○ unlit

Runway intelligence

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

85% of ops

72 land · 2 TO

15% of ops

13 land · 25 TO

Runway 01 carries 85% of operations (72 landings, 2 takeoffs) over the last 30 days. The next most-used is 19 at 15%.

Approach quality

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

01 72 landings

UA 32%

19 13 landings

UA 23%

Approaches to 01 show a 32% unstable-approach rate (23 UA events from 72 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

2.4

flights/day · 73 total

Busy hour (local)

5pm

also 2pm · 6pm

Day vs night

67%

06:00–20:00 local

Traffic concentrates around 5pm–6pm local, averaging 2.4 flights/day. Weekend volume runs 1.1× weekday (2.8 vs 2.4 daily).

Aircraft character

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

Activity is led by (14% of 65 flights). Top three types: , , .

Communications Frequencies

2026-06-11

Airport operations

ARTCC:: ZOA
Mag var:: 16° E

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