Roundup Airport (KRPX), Montana
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Roundup Airport (KRPX) is a public-use, non-towered field in Roundup, Montana, sitting at 3,490 feet elevation and serving light business aviation traffic in the region. The field offers a paved 5,099-foot runway alongside a turf crosswind strip, with self-service fuel available for transient operators. Customs clearance is not handled onsite; the nearest customs airport is Bozeman (KBZN), roughly 116 nautical miles away.
Runways
Roundup Airport has two paved and unpaved runways. The longest, 07/25, is 5,099 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
Roundup Airport has Jet A1 and 100LL available on the field. The airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Roundup Airport does not clear customs. The nearest port of entry is Bozeman Yellowstone International (KBZN), 116 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Roundup Airport recorded 22 business aviation movements in 2025. Traffic peaks in April. Business aviation traffic at KRPX is concentrated in the first half of the year, with April recording the highest monthly count and both June and July showing no business aviation operations.
Business jet movements, FAA TFMSC count. Peak month April, 8 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Roundup Airport has published operating constraints in four categories: access, runway notes, environmental and other notes.
For clearance delivery, contact Billings Approach.
Pilots can activate the medium intensity runway lighting for runway 07/25 and the PAPI for runway 07 and runway 25 on frequency 122.7.
Runway 16/34 is marked with white cones along its full length, with red cones marking the thresholds.
Wildlife is present on and in the vicinity of the airport.
A telephone is available on the field.
Credit card self-service fuel is available 24 hours a day, seven days a week.
Source: FAA Chart Supplement.
Nearby airfields
Roundup Airport has four airfields within 48 NM. The closest is N Bar Ranch, 27.17 NM northwest.
Source: Skystar calculation from official coordinates.
Skystar at KRPX
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 KRPX.
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 KRPX?
Roundup Airport (KRPX) has two runways: a paved asphalt runway, 07/25, measuring 5,099 by 75 feet, and a turf runway, 16/34, measuring 2,460 by 100 feet. The turf runway is marked with white cones along its full length and red cones marking the thresholds. The paved runway is the primary option for business aviation traffic.
Is fuel available at Roundup Airport?
Roundup Airport (KRPX) offers both 100LL and Jet A fuel through credit card self-service, available continuously without attendant support. The field itself is unattended, so pilots handle fueling directly at the pump. No fixed base operator staffing is present on site.
How does a pilot handle customs at KRPX?
Customs processing is not available onsite at Roundup Airport (KRPX). The nearest customs facility is at Bozeman (KBZN), located approximately 116 nautical miles away. Flight crews requiring customs clearance need to route through that airport rather than arranging service at Roundup directly.
What operational hazards should pilots know about at KRPX?
Wildlife has been reported on and in the vicinity of Roundup Airport (KRPX), so pilots should maintain vigilance during arrival and departure. The airport is non-towered and unattended, meaning pilots coordinate clearance delivery through Billings Approach rather than a local tower. Runway lighting, including MIRL and PAPI for runway 07/25, is pilot-activated on frequency 122.7.