KMSN · Dane County Regional Truax Field

MADISON, WISCONSIN · MEDIUM AIRPORT · SCHEDULED SERVICE

887

Elevation ft

Runways

9,006

Longest ft · 18/36

43.14N

89.34W

Dane County Regional Truax Field serves Madison, Wisconsin at 887 ft elevation with its longest runway, 18/36, at 9,006 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 KMSN in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
18/36	9,006 × 150 ft	concrete	lit
03/21	7,200 × 150 ft	concrete	lit
14/32	5,846 × 150 ft	concrete	lit

02Density altitude and turboprop runway margins

Standard temperature at 887 ft is about 13°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, 13°C)	887 ft	2,611 ft	2,204 ft	3,305 ft
Warm day (ISA +10)	2,087 ft	2,845 ft	2,330 ft	3,495 ft
Hot day (ISA +20)	3,287 ft	3,079 ft	2,457 ft	3,685 ft
35°C afternoon	3,500 ft	3,121 ft	2,479 ft	3,719 ft

Planning aid only. Even on a 35°C afternoon the longest runway (18/36, 9,006 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,719 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 KMSN is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KDLL Baraboo Wisconsin Dells Regional Airport	30 nm NW	5,010 ft
KUNU Dodge County Airport	33 nm NE	5,060 ft
KEFT Monroe Municipal Airport	33 nm S	5,000 ft
KJVL Southern Wisconsin Regional Airport	34 nm SE	7,302 ft
KLNR Tri-County Regional Airport	37 nm W	5,000 ft
KMRJ Iowa County Airport	42 nm W	5,001 ft

04Jet A prices and FBOs at KMSN

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

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