Iowa County Airport (KMRJ), Wisconsin
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Iowa County Airport (KMRJ) serves Mineral Point, Wisconsin with two paved asphalt runways, the longer stretching 5,001 feet, and a non-towered traffic pattern typical of general aviation fields in the region. The airport sits roughly 78 nautical miles from the nearest metro area and logged 295 total annual operations in 2025 according to FAA TFMSC data, with business aviation accounting for the majority of that count. Self-service fuel is available continuously, and the field maintains standard weekday attendance hours with on-call coverage on weekends. Customs clearance is not handled onsite; the nearest customs-capable airport is KRFD, about 65 nautical miles away.
Runways
Iowa County Airport has two paved runways. The longest, 11/29, is 5,001 ft long and 75 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
Iowa County Airport has Jet A+ and 100LL available on the field. The airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Iowa County Airport does not clear customs. The nearest port of entry is Chicago / Rockford International (KRFD), 65 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Iowa County Airport recorded 231 business aviation movements in 2025. Traffic peaks in August. Business aviation traffic at KMRJ concentrates in July and August, which together account for a large share of the year's operations.
Business jet movements, FAA TFMSC count. Peak month August, 51 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Iowa County Airport averages 2.8 days above 90°F in July, 30.4 freeze days in January and 3.9 snow days in December. July is the warmest month, with average highs of 81.4°F, and January the coldest, at 26.0°F.
Weather station is 6.9 NM from the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Iowa County Airport has published operating constraints in four categories: runway notes, noise procedures, environmental and other notes.
Runway 11/29 MIRL is preset to low intensity from sunset to sunrise; use CTAF to increase intensity and activate the PAPI for runways 04, 11, 22, and 29. Runway 04/22 MIRL is also controlled via CTAF.
For noise abatement, the preferred no-wind runway is runway 29.
Birds are present on and in the vicinity of the airport.
Fuel is available 24 hours via self service.
For clearance delivery, contact Chicago ARTCC.
Source: FAA Chart Supplement.
Nearby airfields
Iowa County Airport has five airfields within 34 NM. The closest is Platteville Municipal (KPVB), 14.98 NM southwest.
Source: Skystar calculation from official coordinates.
Skystar at KMRJ
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.
$1,200.00 catering order at KMRJ.
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 runways are available at KMRJ?
Iowa County Airport (KMRJ) operates two paved asphalt runways. Runway 11/29 is the primary strip at 5,001 feet long and 75 feet wide, while runway 04/22 measures 3,600 feet by 60 feet. Both surfaces support typical business aviation traffic seen at this Mineral Point, Wisconsin field. Neither runway is lighted with high-intensity systems, relying instead on pilot-controlled MIRL lighting.
Is fuel available at KMRJ?
Iowa County Airport (KMRJ) offers self-service fuel around the clock, with both 100LL and A+ grades on the field. The airport also lists Jet A availability. Attendance runs Monday through Friday from 0600 to 1600, with on-call service on weekends. Pilots arriving outside staffed hours can still fuel using the self-service option.
What is the nearest customs airport to KMRJ?
Iowa County Airport (KMRJ) does not have customs service onsite. The nearest customs-equipped airport is KRFD, located approximately 65.30 nautical miles away. Flights requiring customs clearance near Mineral Point, Wisconsin should plan their routing through KRFD accordingly. No onsite customs designation is listed for KMRJ in current records.
When is business aviation traffic busiest at KMRJ?
Business aviation traffic at Iowa County Airport (KMRJ) concentrates heavily in summer, with August recording 51 operations and July recording 40 operations in 2025, according to FAA TFMSC data. This contrasts sharply with December, which saw only 2 operations. Dispatchers should expect the field to be quieter outside the July-August window, with moderate activity spread through the remaining months.