Airport information
- ICAO / IATA
- KRPX / RPX
- Coordinates
- 46.4751, -108.5415
- Elevation
- 3,500 ft MSL
- Magnetic variation
- 11E
- Sectional chart
- BILLINGS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- GREAT FALLS
- NOTAM facility
- GTF
- Attendance
- UNATNDD
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Activated
- 1940/04
- Distance from city
- 2 N
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:42 AM | 10:42Z |
| Sunrise | 05:21 AM | 11:21Z |
| Sunset | 09:11 PM | 03:11Z |
| Evening civil twilight Loggable night begins | 09:50 PM | 03:50Z |
Plan a flight from KRPX
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- Usually keyed on CTAF 122.8 — confirm the click sequence in the Chart Supplement ↗
Runway lighting aids — 07: 2-light PAPI (left) · 25: 2-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 07 · 067°
- Pattern
- left (turns left)
- TPA
- 4,500 ft MSL (≈1,000 AGL)
- CTAF
- 122.8
Enter the left downwind for Rwy 07 at 4,500 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 07/25
5,098 ft × 75 ft · Asphalt (Excellent)- Heading
- 067° mag · 78° true
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (4°)
- Traffic pattern
- Left
- Approach obstacle
- Gnd, 17 ft, 700 ft from threshold, 0 ft B of centerline — 29:1 slope to clear
- Heading
- 247° mag · 258° true
- Markings
- nonprecision
- VGSI
- 2-light PAPI (left) (3°)
- Traffic pattern
- Left
Runway 16/34
2,460 ft × 100 ft · Turf (Good)- Heading
- 157° mag · 168° true
- Traffic pattern
- Left
- Heading
- 337° mag · 348° true
- Traffic pattern
- Left
| Runway | Length | Your margin |
|---|---|---|
| 07/25 | 5,098 ft | |
| 16/34 | 2,460 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| MILES CITY RCAG | 126.85 | APCH/DEP CTL SVC PRVDD BY SALT LAKE ARTCC (ZLC) ON 126.85/305.2 (MILES CITY RCAG). |
| MILES CITY RCAG | 305.2 | APCH/DEP CTL SVC PRVDD BY SALT LAKE ARTCC (ZLC) ON 126.85/305.2 (MILES CITY RCAG). |
| CTAF | 122.8 | |
| UNICOM | 122.8 |
Source: FAA NASR (current 28-day cycle).
Procedures at a glance
Approaches2
Minimums & Hot Spots
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Fuel available
- 100LL, Jet A-1
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- MAJOR
- Powerplant service
- MAJOR
- Parking
- tiedowns, hangars
- Other services
- Agricultural, Charter, Instruction, Parachute ops, Rental, Survey
Ownership & management
Remarks FAA
- PHONE ON FLD.
- WILDLIFE ON & INVOF ARPT.
- FOR CD CTC BILLINGS APCH AT 406-255-2798.
- ACTVT MIRL RY 07/25 AND PAPI RY 07 & RY 25 - 122.7.
- ULTRALIGHTS ON & INVOF ARPT.
- OR 406-855-7354 CONTACT FOR SVCS
- CREDIT CARD SELF SVC FUEL AVBL 24/7.
- RY 25 RIGHT TFC FM 2200 TO 0700.
- RY 16/34 MKD WITH WHITE CONES FULL LENGTH; RED CONES MARK THR.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open KRPX in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About KRPX
Roundup Airport (RPX · KRPX) is an airport in Roundup, MT, at 3,500 ft MSL. It has 2 runways, the longest 5,098 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KRPX, refreshed from the Aviation Weather Center and FAA NASR.
Does KRPX have a control tower?
No. Roundup Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at KRPX?
Roundup Airport has 2 runways; the longest is 5,098 ft. See the Runways tab for headings, surface, and lighting.
Where is KRPX?
Roundup Airport is in Roundup, MT, at an elevation of 3,500 ft MSL. Coordinates: 46.4751, -108.5415.
Fly out of KRPX often?
Save KRPX as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.