KTWF · Joslin Field Magic Valley Regional Airport
Joslin Field Magic Valley Regional Airport serves Twin Falls, Idaho at 4,154 ft elevation with its longest runway, 08/26, at 8,704 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 |
|---|---|---|---|
| 08/26 | 8,704 × 150 ft | asphalt | lit |
| 12/30 | 3,224 × 75 ft | asphalt | unlit |
02Density altitude and turboprop runway margins
Standard temperature at 4,154 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) | 4,154 ft | 3,248 ft | 2,548 ft | 3,822 ft |
| Warm day (ISA +10) | 5,354 ft | 3,482 ft | 2,675 ft | 4,012 ft |
| Hot day (ISA +20) | 6,554 ft | 3,716 ft | 2,801 ft | 4,202 ft |
| 35°C afternoon | 7,551 ft | 3,911 ft | 2,907 ft | 4,360 ft |
03Nearby fields with 5,000 ft or more
Useful as alternates, as fuel stops when the price at KTWF is high, or as the longer runway on a hot afternoon.
| Airport | Distance | Longest runway |
|---|---|---|
| KJER Jerome County Airport | 15 nm N | 5,002 ft |
| KGNG Gooding Municipal Airport | 29 nm NW | 5,371 ft |
| 06U Jackpot Airport/Hayden Field | 31 nm S | 6,180 ft |
| KSUN Friedman Memorial Airport | 62 nm N | 7,550 ft |
| KU76 Mountain Home Municipal Airport | 67 nm NW | 5,000 ft |
04Jet A prices and FBOs at KTWF
No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KTWF, 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 KTWF or read what a fuel stop actually saves.