3U9 — Boulder Airport, MT

Non-ToweredBoulder, MT • 4,968' MSL

3U9 WeatherLive METAR & TAF

3U9 has 1 runway. The longest is 11/29 at 3,675 ft × 72 ft (turf).

11/29No runway lights3,675 ft × 72 ftTurf

FAA NASR data, cycle 2026-09-03

3U9 field elevation is 4,968 ft MSL. The standard traffic pattern altitude at 3U9 is 5,970 ft MSL (1,000 ft AGL).

Field elevation4,968 ft MSL

Pattern altitude5,970 ft MSL1,000 ft AGL · standard

Control towerNon-towered

FAA NASR data, cycle 2026-09-03

CTAF 122.9 MHz — 3U9 is non-towered; self-announce position and intentions on CTAF.

CTAF122.9

Check 3U9 against your personal minimums, plan a route to it, and see the best runway for the current wind — free.

No, 3U9 is a non-towered airport. The CTAF frequency is 122.9 MHz.

3U9 has 1 runway (11/29). The longest runway is 3,675 feet.

3U9 uses the standard traffic pattern altitude of 1,000 feet AGL — about 5,970 feet MSL at a field elevation of 4,968 feet.

3U9 (Boulder Airport) has a field elevation of 4,968 feet MSL.

3U9 (Boulder Airport) is located in Boulder, MT.