Boulder (3U9)
Non-towered public-use airport serving Boulder, Montana, at 4,968 ft elevation.
Elevation4,968 ft
ControlNon-towered
Longest runway3,675 ft
Magnetic variation17° E
High elevation. At 4,968 ft, density altitude on a warm day can be thousands of feet higher. Check performance with the density altitude calculator.
Live weather
Forecast (TAF)
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Frequencies
| CTAF | 122.9 |
|---|
Runways
| Runway | Size | Surface | Lights |
|---|---|---|---|
| 11/29 | 3,675 × 72 ft | Turf |
No fuel listed. Sectional: Great Falls.
Runway diagram
Drawn to scale from FAA runway-end data, true north up. Not for navigation: use the official FAA airport diagram and Chart Supplement.
Nearby airports
KBTMBert Mooney22 NM SWKHLNHelena Regional24 NM N8U9Canyon Ferry25 NM NE8U8Townsend27 NM E38SDeer Lodge-City-County29 NM W9S5Three Forks30 NM SE
Before you fly here
- Read the FAA Chart Supplement entry for 3U9: traffic pattern, CTAF/UNICOM, hours, fuel and remarks.
- Check NOTAMs and get a weather briefing at 1800wxbrief.com.
- Study the airport diagram and the sectional around 3U9 for airspace and terrain.
- More detail: AirNav · SkyVector
Airport data from the FAA National Airspace System Resource (NASR) subscription effective Oct 1, 2026; magnetic variation as published for 1985. Weather is live from aviationweather.gov. Always confirm with current official sources before flight. This guide is a study aid.