KBTM · Bert Mooney Airport

BUTTE, MONTANA · MEDIUM AIRPORT · SCHEDULED SERVICE

5,550

Elevation ft

Runways

9,000

Longest ft · 15/33

45.95N

112.50W

Bert Mooney Airport serves Butte, Montana at 5,550 ft elevation with its longest runway, 15/33, at 9,000 by 150 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 KBTM in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
15/33	9,000 × 150 ft	asphalt	lit
12/30	5,100 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 5,550 ft is about 4°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, 4°C)	5,550 ft	3,520 ft	2,696 ft	4,043 ft
Warm day (ISA +10)	6,750 ft	3,755 ft	2,822 ft	4,233 ft
Hot day (ISA +20)	7,950 ft	3,989 ft	2,949 ft	4,423 ft
35°C afternoon	9,282 ft	4,248 ft	3,089 ft	4,634 ft

Planning aid only. Even on a 35°C afternoon the longest runway (15/33, 9,000 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,634 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 KBTM is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
K3U3 Bowman Field	20 nm NW	6,011 ft
KRVF Ruby Valley Field	27 nm S	6,000 ft
K38S Deer Lodge City County Airport	28 nm NW	5,800 ft
K9S5 Three Forks Airport	39 nm E	5,100 ft
KDLN Dillon Airport	42 nm S	6,501 ft
KHLN Helena Regional Airport	45 nm NE	9,000 ft

04Jet A prices and FBOs at KBTM

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KBTM, 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 KBTM or read what a fuel stop actually saves.

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