Reference only — not for real-world navigation.
KM45
Alpine County Airport · Markleeville
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
5,867 ft / 1,788 m
Transition Altitude
18,000 ft
Primary Channel
CTAF 122.90 MHz (CTAF)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
17/35 · 4,443 ft · AsphaltUNLITFlight Planning
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Welcome to the technical flight briefing for Alpine County Airport (KM45), located in Markleeville, 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 5,867 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
Alpine County Airport
ICAO / IATA
KM45 / —
Municipality
Markleeville
Country
Region
US-CA — California
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
5,867 ft
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 17 / 35
UNLIT
Runway Length: 4,443 ft / 1,354 m
Runway Width: 50 ft / 15 m
Surface Type: Asphalt
Heading: 184° / 4°
Runway Width: 50 ft / 15 m
Surface Type: Asphalt
Heading: 184° / 4°
RWY 17 (184°)
No ILS / Visual Only
RWY 35 (4°)
No ILS / Visual Only
CTAF CTAF
122.90 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026