Reference only — not for real-world navigation.
US-4765
Las Arenas Earth and Sky Observatory Airport · Alamosa
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
7,582 ft / 2,311 m
Transition Altitude
18,000 ft
Primary Channel
—
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
2/20 · 2,700 ft · DirtUNLITFlight Planning
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Welcome to the technical flight briefing for Las Arenas Earth and Sky Observatory Airport (US-4765), located in Alamosa, 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 7,582 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
Las Arenas Earth and Sky Observatory Airport
ICAO / IATA
US-4765 / —
Municipality
Alamosa
Country
Region
US-CO — Colorado
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
7,582 ft
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 2 / 20
UNLIT
Runway Length: 2,700 ft / 823 m
Runway Width: 40 ft / 12 m
Surface Type: Dirt
Heading: —° / —°
Runway Width: 40 ft / 12 m
Surface Type: Dirt
Heading: —° / —°
RWY 2
No ILS / Visual Only
RWY 20
No ILS / Visual Only
No frequency data available.
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026