Grant County International (KMWH), Washington
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Grant County International (KMWH) sits at Moses Lake, Washington, roughly 62 nautical miles from the nearest metro area, and functions as a former Air Force base converted to civilian and military shared use. The field is towered and carries a Category I airport designation in FAA traffic tables, with CBP inspection services and a USDA compliance agreement supporting international arrivals. Its runway inventory includes a 13,503-foot primary strip, among the longest in the region, which supports heavy jet training and testing activity alongside general aviation and business traffic.
Runways
Grant County International has five paved runways. The longest, 14L/32R, is 13,503 ft long and 200 ft wide, with a concrete surface.
Runway geometry from published threshold coordinates. Not for navigation.
Runways are listed longest first. Helipads and surfaces under 500 ft are excluded.
Source: FAA Form 5010.
Fuel and airfield services
Grant County International has Jet A, Jet A1+ and 100LL available on the field. Fueling is available 24 hours a day, every day, and the airport has an operating control tower.
Source: FAA Form 5010 / NASR.
Customs
Grant County International has US Customs and Border Protection clearance available onsite, with general clearance for international arrivals. A USDA compliance agreement is in place.
Source: CBP list of ports of entry.
Business aviation traffic
Grant County International recorded 2,171 business aviation movements in 2025. Traffic peaks in January. Business aviation traffic at KMWH is heaviest in January and September, with the lowest volume recorded in April.
Business jet movements, FAA TFMSC count. Peak month January, 241 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Grant County International averages 17.5 days above 90°F in July and 26.7 freeze days in January. July is the warmest month, with average highs of 89.7°F, and December the coldest, at 36.2°F.
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Grant County International has published operating constraints in four categories: runway notes, environmental, pavement strength and other notes.
The MALSR system on runway 32R, the REIL on runway 4, and the PAPI on runway 14L are activated via CTAF.
This runway is closed except for military operations and serves as a C-17 assault strip. It is not visible from the airport traffic control tower.
Runway 14L has a concrete touchdown zone extending 3,240 feet; runway 32R has a concrete touchdown zone extending 1,490 feet.
Heavy jet training occurs from the surface up to 5,000 feet within 25 miles of the airport, with possible wake turbulence from operations on runways 09/27 and 14L/32R.
Birds have been reported in the vicinity of the airport during April and October.
PCR VALUE: 565/R/A/W/T
PCR VALUE: 510/R/A/W/T
PCR VALUE: 650/F/A/X/T
PCR VALUE: 580/R/A/W/T
PCR VALUE: 120/R/A/W/T
Taxiway ACR is a movement area only.
Only military landing zone lights are provided.
Taxiway G is unlighted.
Heavy military jet night training operates between 1900 and 0300. When the tower is closed, pilots should announce landing intentions on CTAF.
Taxiway F is not visible from the airport traffic control tower.
All rapid refueling for military helicopters and aircraft requires contacting the fixed base operator on frequency 131.625 for service one hour prior to landing, then proceeding to the terminal ramp. Rapid refueling is available daylight hours daily.
Source: FAA Chart Supplement.
Nearby airfields
Grant County International has five airfields within 38 NM. The closest is Ephrata Municipal (KEPH), 10.03 NM northwest.
Source: Skystar calculation from official coordinates.
Skystar at KMWH
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 KMWH.
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
How long is the main runway at KMWH?
Grant County International's primary runway, 14L/32R, measures 13,503 feet long and 200 feet wide with a concrete surface. This is the longest of the field's five paved runways and the figure listed as max paved length for the airport overall. The length supports heavy jet operations, including military training flights that operate in the area. Two other runways, 04/22 at 10,000 feet and 09/27 at 3,500 feet, round out the field's paved options for a range of aircraft sizes.
Does KMWH have customs service for international arrivals?
Grant County International offers customs service onsite, with CBP inspection services available and a USDA compliance agreement in place. This combination supports aircraft arriving with agricultural cargo or other goods subject to USDA rules. The airport is not listed with a nearest alternate customs facility distance, reflecting that arrangements are handled directly at the field. Operators planning international arrivals at KMWH should coordinate with CBP in advance given the specialized nature of onsite inspection services.
What kind of military activity should pilots expect at Grant County International?
Grant County International hosts heavy military jet training between 1900 and 0300 local, and operators should announce landing intentions on CTAF when the tower is closed. Heavy jet training also occurs from the surface up to 5,000 feet within 25 miles of the field, with possible wake turbulence from operations on runways 09/27 and 14L/32R. One runway configuration is closed to all traffic except military operations and is used as a C-17 assault strip; it is not visible from the tower. Pilots operating at KMWH should expect coordination with military traffic patterns as routine.
Are there bird or wildlife hazards reported at KMWH?
Birds have been reported in the vicinity of Grant County International during April and October, according to the airport's general remarks. Pilots operating during these two months should maintain heightened vigilance for bird activity near the field, particularly during approach and departure phases. No other wildlife hazard periods are noted in the airport's remarks outside of these two months. This seasonal pattern is worth factoring into arrival and departure planning at KMWH during spring and fall.
What lighting is available on approach to KMWH's runways?
Grant County International activates a MALSR system on runway 32R, REIL on runway 4, and a PAPI on runway 14L, all controllable via CTAF. Taxiway G is unlighted, and taxiway F is not visible from the airport traffic control tower. The military landing zone at the field is served only by military landing zone lights, distinct from the standard civilian approach lighting on the main runways. Pilots should account for these lighting limitations when planning arrivals or departures outside daylight hours at KMWH.