Joslin Field / Magic Valley Regional (KTWF), Idaho
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Joslin Field / Magic Valley Regional (KTWF) serves Twin Falls, Idaho, with a towered field offering both 100LL and Jet A+ fuel and a primary runway long enough to handle a range of business aircraft. The airport sits roughly 62 nautical miles from the nearest metro area and about 100 nautical miles from the nearest customs facility at KBOI, factors that shape trip planning for operators using the field. Traffic at KTWF, as tracked by FAA TFMSC, runs to just over 5,250 annual operations, with business aviation accounting for the majority of that activity.
Runways
Joslin Field / Magic Valley Regional has two paved runways. The longest, 08/26, is 8,704 ft long and 150 ft wide, with an asphalt surface.
Runway geometry from published threshold coordinates. Not for navigation.
Runways are listed longest first.
Source: FAA Form 5010.
Fuel and airfield services
Joslin Field / Magic Valley Regional has Jet A1+ and 100LL available on the field. Fueling is available from 6:30am to 8pm, daily, and the airport has an operating control tower.
Source: FAA Form 5010 / NASR.
Customs
Joslin Field / Magic Valley Regional does not clear customs. The nearest port of entry is Boise Air Trml / Gowen Field (KBOI), 100 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Joslin Field / Magic Valley Regional recorded 3,025 business aviation movements in 2025. Traffic peaks in July. Business aviation traffic at KTWF concentrates in July and December, with both months showing noticeably higher operation counts than the rest of the year.
Business jet movements, FAA TFMSC count. Peak month July, 331 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Joslin Field / Magic Valley Regional averages 18.8 days above 90°F in July and 28.2 freeze days in January. July is the warmest month, with average highs of 88.4°F, and December the coldest, at 36.9°F.
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Joslin Field / Magic Valley Regional has published operating constraints in four categories: access, runway notes, pavement strength and other notes.
Line of sight between the Runway 26 approach end and the Runway 12 approach end is not available.
When the tower is closed, activate the MALSR for Runway 26, the REIL for Runway 08, and the HIRL for Runway 08/26 via CTAF. The PAPI for Runway 26 operates continuously.
PCR VALUE: 1020/F/B/X/T
PCR VALUE: 157/F/B/X/T
Taxiways G, H, J, and K are non-ACR movement areas.
A service fee applies between 2000 and 0630; contact the field for information.
Non-ACR movement area.
For clearance delivery, if unable to contact on the FSS frequency, contact Salt Lake ARTCC.
Source: FAA Chart Supplement.
Nearby airfields
Joslin Field / Magic Valley Regional has four airfields within 32 NM. The closest is Jerome County (KJER), 14.77 NM north.
Source: Skystar calculation from official coordinates.
Skystar at KTWF
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$2,400.00 catering order at KTWF.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
It does not move with the size of the order.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What runway length is available at KTWF?
Joslin Field / Magic Valley Regional offers Runway 08/26, a paved asphalt strip measuring 8,704 feet long and 150 feet wide. A secondary runway, 12/30, is also paved and measures 3,224 feet by 75 feet. The longer runway accommodates the bulk of business aviation traffic given its length and width. KTWF's maximum paved runway length of 8,704 feet places it among the better-equipped regional fields in southern Idaho for larger turbine aircraft.
Is jet fuel available at KTWF?
Joslin Field / Magic Valley Regional carries both 100LL and Jet A+ fuel on the field. A service fee applies outside the normal attendance window, specifically between 2000 and 0630 local. Aircraft operators arriving or departing during that period should expect the fee to be applied and should contact the field for details. The field's published attendance schedule runs daily from 0630 to 2000, which corresponds to standard fuel service hours.
What are the operating hours at KTWF?
Joslin Field / Magic Valley Regional is attended daily from 0630 to 2000 local time, seven days a week. Outside this window, pilots should expect a service fee for fuel dispensed between 2000 and 0630. The airport is towered, so pilots operating outside published tower hours should also plan according to lighting activation procedures via CTAF. KTWF's approach lighting, REIL, and runway edge lighting are pilot-activated on CTAF when the tower is closed.
Where is the nearest customs facility to KTWF?
Joslin Field / Magic Valley Regional does not have onsite customs processing. The nearest customs facility is at KBOI, located approximately 100.12 nautical miles away. Operators requiring customs clearance for international arrivals should plan their routing and fuel accordingly, since the distance adds meaningfully to a flight's overall trip time. KTWF pilots should coordinate customs clearance in advance through the Boise facility rather than expecting service at Twin Falls.
How busy is business aviation traffic at KTWF throughout the year?
Business aviation traffic at Joslin Field / Magic Valley Regional, per FAA TFMSC data for 2025, totals 3,025 operations against 5,252 annual operations overall. Traffic is not evenly distributed across the year, with July and December showing the highest monthly counts at 331 and 314 operations respectively. The lowest months are June at 189 operations and April-May in the low 200s. Dispatchers planning trips to KTWF should account for this seasonal concentration when estimating ramp and fuel availability.