K1S3 · Tillitt Field

FORSYTH, MONTANA · SMALL AIRPORT

2,727

Elevation ft

Runway

4,799

Longest ft · 08/26

46.27N

106.62W

Tillitt Field serves Forsyth, Montana at 2,727 ft elevation with its longest runway, 08/26, at 4,799 by 75 ft. The figures below are computed from FAA NASR runway data (via OurAirports) and the same rules of thumb JetDesk uses on the airport page in the app; the POH and current NOTAMs are the authority.

Open K1S3 in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
08/26	4,799 × 75 ft	asphalt (good)	lit

02Density altitude and turboprop runway margins

Standard temperature at 2,727 ft is about 10°C. Every 1,000 ft of density altitude adds roughly 8 percent to a turboprop's takeoff distance and 5 percent to its landing distance. The table uses Piper Meridian book numbers (2,438 ft takeoff and 2,110 ft landing over a 50 ft obstacle at sea level, ISA, max weight) as a reference airplane; heavier turboprops and light jets scale the same way from their own POH figures.

Conditions	Density altitude	Takeoff est.	Landing est.	Landing × 1.5
Standard day (ISA, 10°C)	2,727 ft	2,970 ft	2,398 ft	3,597 ft
Warm day (ISA +10)	3,927 ft	3,204 ft	2,524 ft	3,786 ft
Hot day (ISA +20)	5,127 ft	3,438 ft	2,651 ft	3,976 ft
35°C afternoon	5,781 ft	3,566 ft	2,720 ft	4,080 ft

Planning aid only. Even on a 35°C afternoon the longest runway (08/26, 4,799 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,080 ft needed). The percentages are a generic rule of thumb applied to one reference airplane, not certified performance data for any specific aircraft, and the runway size categories describe the runway, not your airplane's suitability. Verify with the approved flight manual before every flight.

03Nearby fields with 5,000 ft or more

Useful as alternates, as fuel stops when the price at K1S3 is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KM46 Colstrip Airport	25 nm S	5,100 ft
KMLS Miles City Airport - Frank Wiley Field	32 nm E	5,764 ft
KRPX Roundup Airport	80 nm W	5,098 ft
KBIL Billings Logan International Airport	85 nm W	10,518 ft
KGDV Dawson Community Airport	91 nm NE	5,704 ft
KSHR Sheridan County Airport	91 nm S	8,301 ft

04Jet A prices and FBOs at K1S3

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at K1S3, the app flags a price stale after two weeks, and the route finder ranks every field within a corridor of your route by net savings after the cost of the extra cycle. Log a price at K1S3 or read what a fuel stop actually saves.

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