KSIY · Siskiyou County Airport

MONTAGUE, CALIFORNIA · SMALL AIRPORT

2,648

Elevation ft

Runway

7,490

Longest ft · 17/35

41.78N

122.47W

Siskiyou County Airport serves Montague, California at 2,648 ft elevation with its longest runway, 17/35, at 7,490 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.

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01Runways

Runway	Length × width	Surface	Lighting
17/35	7,490 × 150 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 2,648 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)	2,648 ft	2,954 ft	2,389 ft	3,584 ft
Warm day (ISA +10)	3,848 ft	3,189 ft	2,516 ft	3,774 ft
Hot day (ISA +20)	5,048 ft	3,423 ft	2,643 ft	3,964 ft
35°C afternoon	5,684 ft	3,547 ft	2,710 ft	4,064 ft

Planning aid only. Even on a 35°C afternoon the longest runway (17/35, 7,490 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,064 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 KSIY is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KO46 Weed Airport	18 nm S	5,000 ft
KLMT Crater Lake-Klamath Regional Airport	40 nm NE	10,302 ft
KMFR Rogue Valley International-Medford Airport	40 nm NW	8,800 ft
KO89 Fall River Mills Airport	65 nm SE	5,000 ft
KRDD Redding Municipal Airport	77 nm S	7,003 ft
KCEC Jack Mc Namara Field Airport	79 nm W	5,002 ft

04Jet A prices and FBOs at KSIY

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

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