KSPF · Black Hills Airport-Clyde Ice Field

SPEARFISH, SOUTH DAKOTA · SMALL AIRPORT

3,931

Elevation ft

Runways

6,401

Longest ft · 13/31

44.48N

103.78W

Black Hills Airport-Clyde Ice Field serves Spearfish, South Dakota at 3,931 ft elevation with its longest runway, 13/31, at 6,401 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.

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01Runways

Runway	Length × width	Surface	Lighting
13/31	6,401 × 75 ft	asphalt (good)	lit
08/26	4,003 × 100 ft	turf	unlit
04/22	1,995 × 120 ft	turf (good)	unlit

02Density altitude and turboprop runway margins

Standard temperature at 3,931 ft is about 7°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, 7°C)	3,931 ft	3,205 ft	2,525 ft	3,787 ft
Warm day (ISA +10)	5,131 ft	3,439 ft	2,651 ft	3,977 ft
Hot day (ISA +20)	6,331 ft	3,673 ft	2,778 ft	4,167 ft
35°C afternoon	7,274 ft	3,857 ft	2,877 ft	4,316 ft

Planning aid only. Even on a 35°C afternoon the longest runway (13/31, 6,401 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,316 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 KSPF is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
K49B Sturgis Municipal Airport	18 nm E	5,100 ft
KW43 Hulett Municipal Airport	35 nm W	5,500 ft
KRAP Rapid City Regional Airport	41 nm SE	8,701 ft
KECS Mondell Field	42 nm SW	5,310 ft

04Jet A prices and FBOs at KSPF

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

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