Reference only — not for real-world navigation.
K1S3
Tillitt Field · Forsyth
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
2,727 ft / 831 m
Transition Altitude
18,000 ft
Primary Channel
FSS 122.20 MHz (GREAT FALLS)
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
08/26 · 4,799 ft · ASPH-GLIGHTEDFlight Planning
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Welcome to the technical flight briefing for Tillitt Field (K1S3), located in Forsyth, 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 2,727 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
Tillitt Field
ICAO / IATA
K1S3 / —
Municipality
Forsyth
Country
Region
US-MT — Montana
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
2,727 ft
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 08 / 26
LIGHTED
Runway Length: 4,799 ft / 1,463 m
Runway Width: 75 ft / 23 m
Surface Type: ASPH-G
Heading: 96° / 276°
Runway Width: 75 ft / 23 m
Surface Type: ASPH-G
Heading: 96° / 276°
RWY 08 (96°)
No ILS / Visual Only
RWY 26 (276°)
No ILS / Visual Only
FSS GREAT FALLS
122.20 MHz
UNIC CTAF/UNICOM
122.80 MHz
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026