Big Sky Field
S85 has 1 runway. The longest is 8/26 at 3,800 ft × 60 ft (asphalt).
FAA NASR data, cycle 2026-09-03
S85 field elevation is 1,954 ft MSL. The standard traffic pattern altitude at S85 is 2,950 ft MSL (1,000 ft AGL). Fuel available at S85: 100LL.
FAA NASR data, cycle 2026-09-03
CTAF 122.8 MHz — S85 is non-towered; self-announce position and intentions on CTAF.
Check KS85 against your personal minimums, plan a route to it, and see the best runway for the current wind — free.
No, S85 is a non-towered airport. The CTAF frequency is 122.8 MHz.
S85 has 1 runway (8/26). The longest runway is 3,800 feet.
S85 uses the standard traffic pattern altitude of 1,000 feet AGL — about 2,950 feet MSL at a field elevation of 1,954 feet.
Yes. S85 (Big Sky Field) has 100LL available. Call the field for hours, self-serve availability and price.
S85 (Big Sky Field) has a field elevation of 1,954 feet MSL.
S85 (Big Sky Field) is located in Culbertson, MT.