KRVF · Ruby Valley Field

TWIN BRIDGES, MONTANA · SMALL AIRPORT

4,777

Elevation ft

Runways

6,000

Longest ft · 17/35

45.53N

112.30W

Ruby Valley Field serves Twin Bridges, Montana at 4,777 ft elevation with its longest runway, 17/35, at 6,000 by 60 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 KRVF in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
17/35	6,000 × 60 ft	asphalt	lit
07/25	2,866 × 100 ft	turf/dirt	unlit

02Density altitude and turboprop runway margins

Standard temperature at 4,777 ft is about 5°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, 5°C)	4,777 ft	3,370 ft	2,614 ft	3,921 ft
Warm day (ISA +10)	5,977 ft	3,604 ft	2,741 ft	4,111 ft
Hot day (ISA +20)	7,177 ft	3,838 ft	2,867 ft	4,301 ft
35°C afternoon	8,323 ft	4,061 ft	2,988 ft	4,482 ft

Planning aid only. Even on a 35°C afternoon the longest runway (17/35, 6,000 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,482 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 KRVF is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KDLN Dillon Airport	20 nm SW	6,501 ft
KBTM Bert Mooney Airport	27 nm N	9,000 ft
KEKS Ennis Big Sky Airport	32 nm SE	7,600 ft
K9S5 Three Forks Airport	37 nm NE	5,100 ft
K3U3 Bowman Field	44 nm NW	6,011 ft
KBZN Bozeman Yellowstone International Airport	50 nm E	8,994 ft

04Jet A prices and FBOs at KRVF

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

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