Circle Town County Airport (4U6), Montana
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Circle Town County (4U6) is a public-use airport in Circle, Montana, serving low volumes of business aviation traffic. The field combines a paved runway with a secondary turf strip and operates without a control tower.
Runways
Circle Town County Airport has two paved and unpaved runways. The longest, 12/30, is 4,100 ft long and 75 ft wide, with an asphalt surface.
Runways are listed longest first.
Source: FAA Form 5010.
Fuel and airfield services
Circle Town County Airport has 100LL available on the field. Fueling is available from 8am to 5pm, daily, and the airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Circle Town County Airport does not clear customs. The nearest port of entry is Williston Basin International (KXWA), 89 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Circle Town County Airport recorded 32 business aviation movements in 2025. Traffic peaks in February. Business aviation traffic at Circle Town County (4U6) is concentrated in the winter months of January, February, and December, with far fewer operations recorded through the spring and summer.
Business jet movements, FAA TFMSC count. Peak month February, 8 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Circle Town County Airport averages 12.9 days above 90°F in July and 30.5 freeze days in January. July is the warmest month, with average highs of 87.1°F, and January the coldest, at 28.5°F.
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Circle Town County Airport has published operating constraints in two categories: runway notes and other notes.
An 8-foot-deep drainage ditch is located 200 feet from the runway 03/21 thresholds.
MIRL for runway 12/30 and PAPI for runway 12 and runway 30 are pilot-activated on CTAF.
The runway 03/21 thresholds are marked with red cones.
The runway is rough, with long grass, and the runway edges are not marked.
Closed during winter months.
Transverse cracks occur at 100-foot intervals with significant width and depth.
Unusable in wet weather.
For clearance delivery, contact Salt Lake ARTCC.
Source: FAA Chart Supplement.
Nearby airfields
Circle Town County Airport has four airfields within 46 NM. The closest is Dawson Community (KGDV), 34.99 NM southeast.
Source: Skystar calculation from official coordinates.
Skystar at 4U6
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.
$600.00 catering order at 4U6.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
The $75 minimum applies below $862.50.
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 Circle Town County (4U6)?
Circle Town County (4U6) has a paved runway, 12/30, measuring 4,100 by 75 feet with an asphalt surface. A second runway, 03/21, is a 2,280-foot turf strip that is unmarked at the edges and unusable in wet weather.
Is fuel available at 4U6?
Circle Town County (4U6) offers 100LL fuel only; no Jet A is available on the field. The airport is attended Monday through Friday from 0800 to 1700 local, outside of which fuel access depends on field conditions.
Does Circle Town County have customs clearance on site?
Circle Town County (4U6) has no onsite customs service. The nearest customs facility is at KXWA, located approximately 88.74 nautical miles away, so arriving aircraft needing clearance must plan accordingly.