Benchmark Airport

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Location

Latitude: 
 47-28-55.3000N (47.482028)
Longitude: 
 112-52-20.3000W (-112.872306)
Elevation: 
 5434.0 feet MSL (1656 m MSL)
Magnetic Variation: 
 12.3 E (as of December 2025 from WMM2020 model)
Time Zone: 
 UTC -7.0 (Standard Time)
UTC -6.0 (Daylight Savings Time)
From City: 
 19 N.M. W of Augusta, Montana
Found On: 
 Great Falls Chart
FAA Region: 
 ANM

Contacts

Manager: 
Publicly owned: 
BJORN TROBERG
HELENA & LEWIS & CLARK NAT FORESTS, 2880 SKYWAY DRIVE
HELENA, MT 59602
(406) 495-3832		 U S FOREST SERVICE
LEWIS & CLARK NATNL FOREST
CHOTEAU, MT 59422
406-791-7700

Operations

Airport Status: 
 Operational
Facility Use: 
 Public
Type: 
 Airport
Activation Date: 
 03/1965
Control tower: 
 No
Attendance (Months/Days/Hours): 
 Months/Days/Hours
Unattended
Boundary ARTCC: 
 ZLC (Salt Lake City)
Responsible ARTCC: 
 ZLC (Salt Lake City)
Segmented Circle Indicator: 
 Yes
Traffic Pattern Altitude (MSL): 
 6434 feet (1961 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:  122.900

       

    Fixed Based Operators (FBOs) & Fuel

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    Area Code: 406
    Business Name Frequency Phone Fuel Grade
    Benchmark Airport
      
    		466-5341
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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 3U7

    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
    29.4 Seeley Lake Airport
    (23S)    		 232 220 100LL (Texaco), Mogas (Conoco)
    30.8 Lindey's Landing West Seaplane Base
    (M35)    		 233 221 MOGAS
    35.2 Choteau Airport
    (KCII CII)    		 53 41 100LL, Jet A
    50.0 Ronan Airport
    (7S0)    		 276 263 100LL, Jet A+
    54.7 Polson Airport
    (8S1)    		 284 271 100LL, Jet A+
    54.8 Conrad Airport
    (S01)    		 40 28 100LL
    60.2 Missoula Montana Airport
    (MSO KMSO MSO)    		 236 223 100LL, Jet A-1+
    60.9 Great Falls International Airport
    (GTF KGTF GTF)    		 89 77 100LL, Jet A
    63.9 Helena Regional Airport
    (HLN KHLN HLN)    		 144 132 100, 100LL, Jet A
    65.8 Deer Lodge-City-County Airport
    (38S)    		 176 164 100LL, Jet A
    70.4 Cut Bank International Airport
    (CTB KCTB CTB)    		 16 4 100LL, Jet A, Jet A+
    71.2 Kalispell City Airport
    (S27)    		 306 293 100LL, Jet A
    74.6 Glacier Park International Airport
    (FCA KGPI GPI)    		 312 299 100LL, Jet A
    75.0 Stevensville Airport
    (32S)    		 220 207 100LL
    75.2 Shelby Airport
    (SBX KSBX SBX)    		 31 19 100LL, Jet A+
    79.7 Bowman Field Airport
    (3U3)    		 179 167 100LL, Jet A
    89.6 Ravalli County Airport
    (HRF)    		 215 203 100LL, Jet A, Jet A+
    92.9 Fort Benton Airport
    (79S)    		 75 64 100LL
    92.9 Bert Mooney Airport
    (BTM KBTM BTM)    		 170 158 100, 100LL, Jet A
    97.5 Liberty County Airport
    (KLTY LTY)    		 50 38 100LL

    Notices to Airmen (NOTAMS)

    NOTAMs

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    NOTAMS within

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    NM of 3U7

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

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    NM of 3U7

    Remarks

    A110-1 SNOW REMOVAL NA.
    A110-2 MTS PARL E & W; IN TRSN SFC.
    A110-4 SVCS NA.
    A110-5 FONE NA; CABIN 1 MI NW.
    A110-6 FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
    A3 WI LEWIS & CLARK NATIONAL FOREST.
    A30-12/30 PSBL MOD-SVR CROSSWIND & TURB.
    A30A-12 RISES UPHILL 120 FT; RISING TRRN BYD.
    A30A-30 RCMDD DEP COND PMTG.
    A33-12/30 LRG CRACKS & WEEDS FULL LEN.
    A52-12 33:1 TO THR. +65 FT TREES 0-150 FT R 2150 FT FM RWY END.
    A55-12 +58 FT TREES ON CNTRLN.
    A55-30 +250 FT TREES ON CNTRLN.
    A83 3 WDI; BOTH ENDS & MIDPT.

    Runways

    Runway Summary

    Runways: 12/30
    Longest Runway: 12/30 is 6000 ft (1829 m) long
    Runways with an Instrument Approach:

    3U7 Airport Runway Details

    Runway 12/30  6000 ft x 100 ft (1829 m x 30 m)
    Surface:  Asphalt - Poor condition - No special surface treatment

    Runway Weight Bearing Capacity (in thousands of pounds) 
    Single Wheel Landing Gear:  45.0
    Dual Wheel Landing Gear:  80.0
    Dual Tandem Wheel Landing Gear:  140.0

    Runway 12

    Runway 30
    Elevation: 
    		 5316.0 5434.0
    Latitude: 
    		 47-29-17.9692N 47-28-32.7168N
    Longitude: 
    		 112-52-48.5065W 112-51-52.1301W
    Runway True Alignment: 
    		 140 320
    Glide Path Angle: 
    		 0.0 degrees 0.0 degrees
    Traffic Pattern: 
    		 Left Left
    Runway Markings Type: 
    		 Basic Basic
    Runway Markings Condition:
    		Fair Fair
    Object at End: 
    		 TREES TREES
    Object Height: 
    		 39 41
    Distance from End: 
    		 372 461
    Object Centerline Offset: 
    		 0 ft. left and right of centerline 0 ft. left and right of centerline

    Services

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

    Ratings and Reviews

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    Maps & Diagrams

    3U7 Sectional

    Flight Planning
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    3U7 Diagram


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