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U91 Grasmere Airport
Grasmere, Idaho, USA

GOING TO GRASMERE?

FAA INFORMATION EFFECTIVE 11 JUNE 2026

Location

FAA Identifier: U91
Lat/Long: 42-22-23.9000N 115-52-46.0000W
42-22.398333N 115-52.766667W
42.3733056,-115.8794444
(estimated)
Elevation: 5144 ft. / 1568 m (estimated)
Variation: 16E (1985)
Time zone: UTC -6 (UTC -7 during Standard Time)
Zip code: 83604

Airport Operations

Airport use: Open to the public
Activation date: 04/1956
Control tower: no
ARTCC: SALT LAKE CITY CENTER
FSS: BOISE FLIGHT SERVICE STATION
NOTAMs facility: BOI (NOTAM-D service available)
Attendance: UNATNDD
Wind indicator: yes
Segmented circle: yes

Airport Communications

CTAF: 122.9

Airport Services

Airframe service: NONE
Powerplant service: NONE
Bottled oxygen: NONE
Bulk oxygen: NONE

Runway Information

Runway 5/23

Dimensions: 2750 x 150 ft. / 838 x 46 m
Surface: dirt, in fair condition
Runway edge markings: 05/23 EDGES & THRS MARKED WITH WHITE ROCKS.
RUNWAY 5  RUNWAY 23
Latitude: 42-22.318167N42-22.477333N
Longitude: 115-53.052333W115-52.480667W
Elevation: 5144.0 ft.5127.0 ft.
Traffic pattern: leftleft
Obstructions: 4 ft. fence, 50 ft. from runway, 125 ft. left of centerline, 12:1 slope to clear
RY 05, 4 FT FENCE AT 90 FT ON CNTRLN; 7 FT ROAD AT 150 FT ON CNTRLN. 65 FT MARKED POWERLINE AT 900 FT ON CNTRLN.		none

Airport Ownership and Management from official FAA records

Ownership: Publicly-owned
Owner: STATE OF IDAHO-DIV. OF AERONAUTICS
BOX 7129
BOISE, ID 83707-1129
Phone 208-334-8775
Manager: DIV. OF AERONAUTICS
BOX 7129
BOISE, ID 83707-1129
Phone 208-334-8775

Additional Remarks

- NO WINTER MAINTENANCE.
- RY 05/23 SFC MAY BE POOR DUE TO DAMAGE BY LIVESTOCK; GROUND VEHICLES AND RODENTS.
- NO TELEPHONE AVBL AT ARPT.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.

Instrument Procedures

There are no published instrument procedures at U91.

Some nearby airports with instrument procedures:

10U - Owyhee Airport (29 nm SW)
KMUO - Mountain Home Air Force Base (40 nm N)
U76 - Mountain Home Municipal Airport (46 nm N)
KGNG - Gooding Municipal Airport (59 nm NE)
KTWF - Joslin Field/Magic Valley Regional Airport (62 nm E)
  
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From to U91

Sunrise and sunset
Times for 11-Jun-2026
 Local
(UTC-6)		 Zulu
(UTC)
Morning civil twilight05:3311:33
Sunrise06:0712:07
Sunset21:1903:19
Evening civil twilight21:5403:54

Current date and time
Zulu (UTC)  11-Jun-2026 09:26:40
Local (UTC-6)  11-Jun-2026 03:26:40
 
METAR
KMUO 
40nm N 		110855Z 31006KT 8SM CLR 06/M05 A3017 RMK AO2A SLP211 T00591051 51003 $
TAF
KMUO 
40nm N 		110200Z 1102/1208 32015G25KT 9999 FEW150 QNH3010INS BECMG 1103/1104 30010G15KT 9999 FEW170 QNH3014INS BECMG 1106/1107 VRB06KT 9999 FEW140 QNH3007INS TX26/1123Z TN01/1112Z
NOTAMs
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