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The Pilots Desk
Small airport

Alta Sierra Airport

ICAO 09CL🇺🇸 Grass Valley
Coordinates
39.1138°N, 121.0570°W
Elevation
2,275 ft (693 m)
Type
Small airport
Region
US-CA
Time zone
Los Angeles(UTC-07:00)
Magnetic variation
12.9° E

Daylight today(Aug 30, 2026, local time)

Civil dawn
06:05
Sunrise
06:32
Sunset
19:40
Civil dusk
20:07

About 13h 8m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.

About Alta Sierra Airport

Alta Sierra Airport is a small airport in Grass Valley, United States. It sits at an elevation of 2,275 ft (693 m) and has 1 runway, the longest 2,834 ft / 864 m with a hard surface. It observes America/Los Angeles local time. The nearest airport is Nevada County Airport (KGOO), about 7.1 nm to the nne.

Summary generated from this airport’s structured data — reference only.

Live traffic nearby

Aircraft currently within ~40 nm, from live ADS-B. Positions are approximately real-time — not for navigation.

Loading live traffic…

Live ADS-B by adsb.lol & the OpenSky Network. Not for navigation.

Map

Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.

Runways (1)

RunwayLengthWidthSurfaceLightingStatus
01 / 192,834 ft / 864 m50 ftAsph-fUnlitOpen

Radio frequencies (1)

TypeDescriptionFrequency
CTAFCTAF122.900 MHz

Nearby airports

Great-circle distance and true bearing from Alta Sierra Airport.

Live tracking (FR24) Open in Maps
🇺🇸 More airports in United States📘 Flying in the United States: a pilot's guide

Frequently asked questions

Where is Alta Sierra Airport located?

Alta Sierra Airport is small airport located in Grass Valley, United States, at an elevation of 2,275 ft (693 m).

How many runways does Alta Sierra Airport have?

Alta Sierra Airport has 1 runway, the longest being 2,834 ft / 864 m.

What time zone is Alta Sierra Airport in?

Alta Sierra Airport is in the America/Los Angeles time zone (UTC-07:00).

What is the magnetic variation at Alta Sierra Airport?

The magnetic variation (declination) at Alta Sierra Airport is approximately 12.9° E, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.

What airports are near Alta Sierra Airport?

The nearest airport to Alta Sierra Airport is Nevada County Airport (KGOO), about 7.1 nm to the nne, followed by Auburn Municipal Airport and Limberlost Ranch Airport.

Is the information on this page suitable for flight planning?

No. Alta Sierra Airport data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.