Big Sky Field Airport

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Location

Latitude: 
 48-09-12.8150N (48.15356)
Longitude: 
 104-30-14.6000W (-104.504056)
Elevation: 
 1953.0 feet MSL (595 m MSL)
Magnetic Variation: 
 8.1 E (as of December 2025 from WMM2020 model)
Time Zone: 
 UTC -7.0 (Standard Time)
UTC -6.0 (Daylight Savings Time)
From City: 
 01 N.M. NE of Culbertson, Montana
Found On: 
 Billings Chart
FAA Region: 
 ANM

Contacts

Manager: 
Publicly owned: 
ROBERT JASPER
BOX 351
CULBERTSON, MT 59218
406-787-5271		 ROOSEVELT COUNTY & CITY
210 BROADWAY
CULBERTSON, MT 59218
406-787-5271

Operations

Airport Status: 
 Operational
Facility Use: 
 Public
Type: 
 Airport
Activation Date: 
 10/1950
Control tower: 
 No
Attendance (Months/Days/Hours): 
 Months/Days/Hours
Unattended
Boundary ARTCC: 
 ZLC (Salt Lake City)
Responsible ARTCC: 
 ZLC (Salt Lake City)
Lighting Schedule: 
 SEE RMK
Segmented Circle Indicator: 
 Yes
Traffic Pattern Altitude (MSL): 
 2953 feet (900 m)
NOTAMs Facility: 
 GTF
NOTAM-D Service: 
 Yes
International Airport of Entry: 
 No
Customs Landing Rights: 
 No
Military Landing Rights: 
 Yes
Civil/Military Joint Use: 
 No

Based Aircraft

Annual Operations (as of )

Communications

CTAF:  122.800
Unicom:  122.800
AWOS-2:  120.000 (406-787-5819)

       

    Fixed Based Operators (FBOs) & Fuel

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    Area Code: 406
    Business Name Frequency Phone Fuel Grade
    Modern Aire Flight Service
      
    		Unicom 122.8 787-6620 100LL
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    .

    Flight Service Stations

    Primary Alternate
    FSS on Field:  N
    FSS Name (ID):  Great Falls(GTF)
    Frequency: 
    Toll Free Phone:  1-800-WX-BRIEF

    Instrument Procedures / Charts

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    Navigation Aids (Navaids) near S85

    Navigational Aid (NAVAID) distances from the airport are listed in Nautical Miles (NM).

    Nearby Airports with Fuel

    Dist (NM) Name (Airport IDs) True Hdg Mag Hdg Fuel Grade
    29.6 Sidney-Richland Regional Airport
    (SDY KSDY SDY)    		 154 146 100LL, Jet A
    38.2 Sher-Wood Airport
    (PWD KPWD PWD)    		 358 350 100LL
    39.2 Richey Airport
    (7U8)    		 216 208 80, 100LL
    43.0 L M Clayton Airport
    (OLF KOLF OLF)    		 265 256 100LL
    54.1 Scobey Airport
    (9S2)    		 316 307 100LL, Jet A
    61.3 Circle Town County Airport
    (4U6)    		 224 215 100LL
    62.1 Dawson Community Airport
    (GDV KGDV GDV)    		 191 183 100LL, Jet A+
    65.6 Tioga Municipal Airport
    (VEX D60)    		 77 70 100LL, Jet A+
    84.2 Stanley Municipal Airport
    (08D)    		 83 76 100LL, Jet A+, MOGAS
    84.5 Wokal Field/Glasgow-Valley County Airport
    (GGW KGGW GGW)    		 273 264 100LL, Jet A-1+
    95.6 Parshall-Hankins Airport
    (Y74)    		 96 90 100LL

    Notices to Airmen (NOTAMS)

    NOTAMs

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    NOTAMS within

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    This field is required
    NM of S85

    NOTAM Flight Path Search (Enter from two to five locations below)

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    NM of S85

    Remarks

    A110-1 FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
    A110-2 2,876 FT TWRS 3.5 MIS NW.
    A17 ON CALL ALL HOURS 406-787-6680/0660.
    A70-FUEL-10 0LL SELF SERVICE CREDIT CARD 24/7
    A81-APT ACTVT MIRL RY 08/26 & PAPI RY 26 - CTAF.

    Runways

    Runway Summary

    Runways: 08/26
    Longest Runway: 08/26 is 3800 ft (1158 m) long
    Runways with an Instrument Approach:

    S85 Airport Runway Details

    Runway 08/26  3800 ft x 60 ft (1158 m x 18 m)
    Surface:  Asphalt - Excellent condition - No special surface treatment
    Runway Edge Lights:  Medium Intensity

    Runway Weight Bearing Capacity (in thousands of pounds) 
    Single Wheel Landing Gear:  12.5

    Runway 08

    Runway 26
    Elevation: 
    		 1952.6 1933.6
    Latitude: 
    		 48-09-12.7900N 48-09-12.8400N
    Longitude: 
    		 104-30-42.6100W 104-29-46.5900W
    Glide Path Angle: 
    		 0.0 degrees 3.0 degrees
    Traffic Pattern: 
    		 Left Left
    Runway Markings Type: 
    		 Basic Basic
    Runway Markings Condition:
    		Good Good
    Visual Glide Slope Indicators: 
    		 2-Light PAPI On Left Side Of Runway
    Threshold Crossing Height: 
    		 27

    Services

    Airframe Repair: 
    		 None
    Powerplant Repair: 
    		 None
    Bottled Oxygen: 
    		 None
    Bulk Oxygen: 
    		 None
    Fuel Available: 
    		 100LL
    Landing Fees: 
    		 No
    Parking: 
    		 Tiedowns available

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    Maps & Diagrams

    S85 Sectional

    Flight Planning
    at skyvector.com

    S85 Diagram


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