Reference only — not for real-world navigation.
K7S1
Ruby Valley Field · Twin Bridges
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
4,777 ft / 1,456 m
Transition Altitude
18,000 ft
Primary Channel
CTAF 122.90 MHz (CTAF)
Live Conversion
inHg
hPa
Flight Planning
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Welcome to the technical flight briefing for Ruby Valley Field (K7S1), located in Twin Bridges, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 2 active runways with a maximum elevation of 4,777 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
Ruby Valley Field
ICAO / IATA
K7S1 / —
Municipality
Twin Bridges
Country
Region
US-MT — Montana
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
4,777 ft
Official Website
Wikipedia
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 17 / 35
LIGHTED
Runway Length: 6,000 ft / 1,829 m
Runway Width: 60 ft / 18 m
Surface Type: Asphalt
Heading: 182° / 2°
Runway Width: 60 ft / 18 m
Surface Type: Asphalt
Heading: 182° / 2°
RWY 17 (182°)
No ILS / Visual Only
RWY 35 (2°)
No ILS / Visual Only
Runway 07 / 25
UNLIT
Runway Length: 2,866 ft / 874 m
Runway Width: 100 ft / 30 m
Surface Type: Turf/Dirt
Heading: 83° / 262°
Runway Width: 100 ft / 30 m
Surface Type: Turf/Dirt
Heading: 83° / 262°
RWY 07 (83°)
No ILS / Visual Only
RWY 25 (262°)
No ILS / Visual Only
CTAF CTAF
122.90 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026