K4U6 · Circle Town County Airport
Circle Town County Airport serves Circle, Montana at 2,426 ft elevation with its longest runway, 12/30, at 4,100 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 K4U6 in JetDesk: live METAR, TAF, winds and runway verdict →
01Runways
| Runway | Length × width | Surface | Lighting |
|---|---|---|---|
| 12/30 | 4,100 × 75 ft | asphalt (good) | lit |
| 03/21 | 2,280 × 195 ft | turf | unlit |
02Density altitude and turboprop runway margins
Standard temperature at 2,426 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) | 2,426 ft | 2,911 ft | 2,366 ft | 3,549 ft |
| Warm day (ISA +10) | 3,626 ft | 3,145 ft | 2,493 ft | 3,739 ft |
| Hot day (ISA +20) | 4,826 ft | 3,379 ft | 2,619 ft | 3,929 ft |
| 35°C afternoon | 5,408 ft | 3,493 ft | 2,681 ft | 4,021 ft |
03Nearby fields with 5,000 ft or more
Useful as alternates, as fuel stops when the price at K4U6 is high, or as the longer runway on a hot afternoon.
| Airport | Distance | Longest runway |
|---|---|---|
| KGDV Dawson Community Airport | 35 nm SE | 5,704 ft |
| KOLF L M Clayton Airport | 41 nm N | 5,091 ft |
| KSDY Sidney - Richland Regional Airport | 58 nm E | 5,705 ft |
| KMLS Miles City Airport - Frank Wiley Field | 61 nm S | 5,764 ft |
| KGGW Glasgow Valley County Airport Wokal Field | 64 nm NW | 5,002 ft |
04Jet A prices and FBOs at K4U6
No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at K4U6, 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 K4U6 or read what a fuel stop actually saves.