KLNR · Tri-County Regional Airport

SPRING GREEN, WISCONSIN · SMALL AIRPORT

717

Elevation ft

Runways

5,000

Longest ft · 09/27

43.21N

90.18W

Tri-County Regional Airport serves Spring Green, Wisconsin at 717 ft elevation with its longest runway, 09/27, at 5,000 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 KLNR in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
09/27	5,000 × 75 ft	asphalt	lit
18/36	1,850 × 60 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 717 ft is about 14°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, 14°C)	717 ft	2,578 ft	2,186 ft	3,278 ft
Warm day (ISA +10)	1,917 ft	2,812 ft	2,312 ft	3,468 ft
Hot day (ISA +20)	3,117 ft	3,046 ft	2,439 ft	3,658 ft
35°C afternoon	3,289 ft	3,079 ft	2,457 ft	3,685 ft

Planning aid only. Even on a 35°C afternoon the longest runway (09/27, 5,000 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,685 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 KLNR is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KMRJ Iowa County Airport	20 nm S	5,001 ft
KOVS Boscobel Airport	22 nm W	5,000 ft
KDLL Baraboo Wisconsin Dells Regional Airport	26 nm NE	5,010 ft
KMSN Dane County Regional Truax Field	37 nm E	9,006 ft
KPDC Prairie Du Chien Municipal Airport	43 nm W	5,000 ft

04Jet A prices and FBOs at KLNR

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

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