Reference only — not for real-world navigation.
3U9
Boulder Airport · Boulder
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
4,968 ft / 1,514 m
Transition Altitude
18,000 ft
Primary Channel
—
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
11/29 · 3,675 ft · TURF-FUNLITFlight Planning
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Welcome to the technical flight briefing for Boulder Airport (3U9), located in Boulder, 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 4,968 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
Boulder Airport
ICAO / IATA
3U9 / —
Municipality
Boulder
Country
Region
US-MT — Montana
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
4,968 ft
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 11 / 29
UNLIT
Runway Length: 3,675 ft / 1,120 m
Runway Width: 72 ft / 22 m
Surface Type: TURF-F
Heading: —° / —°
Runway Width: 72 ft / 22 m
Surface Type: TURF-F
Heading: —° / —°
RWY 11
No ILS / Visual Only
RWY 29
No ILS / Visual Only
No frequency data available.
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026