What is the CTAF frequency at 4S9?

Portland Mulino Airport's CTAF frequency is 123.05.

Airports › Oregon › 4S9 › Frequencies

Portland Mulino Airport frequencies

Radio frequencies for Portland Mulino Airport (4S9) in Portland-Mulino, OR — tower, ground, ATIS, CTAF, and approach/departure for your radio setup.

Frequencies from FAA NASR. For planning and education only; always verify against official sources.