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 3,000 feet. SkyMeter has observed roughly 0 arrivals and 2 departures per day on average over the last 1 days.

Safety incidents

Last 1 days · 0 total

NORMAL

Current weather

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

37m ago

Temp

73°F

Wind

10 kts

120°

Visib

10+ km

Ceil

—

KBAB 160455Z COR AUTO 12010KT 10SM CLR 23/06 A2979 RMK AO2 SLP090 T02300063 CHINO RWY33 $ COR 0457

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

75% of ops

48 land · 0 TO

25% of ops

16 land · 26 TO

Runway 01 carries 75% of operations (48 landings, 0 takeoffs) over the last 30 days. The next most-used is 19 at 25%.

Approach quality

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

01 48 landings

UA 31%

19 16 landings

UA 19%

Approaches to 01 show a 31% unstable-approach rate (15 UA events from 48 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

2.3

flights/day · 70 total

Busy hour (local)

5pm

also 6pm · 2pm

Day vs night

64%

06:00–20:00 local

Traffic concentrates around 2pm–5pm local, averaging 2.3 flights/day. Weekend volume runs 1.1× weekday (2.6 vs 2.3 daily).

Aircraft character

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

Activity is led by (15% of 60 flights). Top three types: , , .

Communications Frequencies

2026-06-11

Airport operations

ARTCC:: ZOA
Mag var:: 16° E

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