Reference only — not for real-world navigation.
09CL
Alta Sierra Airport · Grass Valley
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
2,275 ft / 693 m
Transition Altitude
18,000 ft
Primary Channel
CTAF 122.90 MHz (CTAF)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
01/19 · 3,000 ft · ASPH-FUNLITFlight Planning
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Welcome to the technical flight briefing for Alta Sierra Airport (09CL), located in Grass Valley, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 1 active runway with a maximum elevation of 2,275 ft. Please note that this field primarily supports VFR and visual approach procedures.Reference the data below for primary communication channels and detailed runway characteristics. Pilots should observe a Transition Altitude of 18,000 ft verified for this field for altimeter reset procedures.
Full Name
Alta Sierra Airport
ICAO / IATA
09CL / —
Municipality
Grass Valley
Country
Region
US-CA — California
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
2,275 ft
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 01 / 19
UNLIT
Runway Length: 3,000 ft / 914 m
Runway Width: 50 ft / 15 m
Surface Type: ASPH-F
Heading: 26° / —°
Runway Width: 50 ft / 15 m
Surface Type: ASPH-F
Heading: 26° / —°
RWY 01 (26°)
No ILS / Visual Only
RWY 19
No ILS / Visual Only
CTAF CTAF
122.90 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026