What is the CTAF frequency at 9S5?

Three Forks Airport's CTAF frequency is 122.8.

Three Forks Airport frequencies

Radio frequencies for Three Forks Airport (9S5) in Three Forks, MT — tower, ground, ATIS, CTAF, and approach/departure for your radio setup.

CTAF	122.8
UNICOM	122.8

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