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81LL Otterbach Farm Airport
Mendota, Illinois, USA

GOING TO MENDOTA?

FAA INFORMATION EFFECTIVE 06 AUGUST 2026

Location

FAA Identifier: 81LL
Lat/Long: 41-34-09.1180N 089-10-25.3130W
41-34.151967N 089-10.421883W
41.5691994,-89.1736981
(estimated)
Elevation: 840 ft. / 256 m (estimated)
Variation: 00E (1985)
From city: 2 miles NW of MENDOTA, IL
Time zone: UTC -5 (UTC -6 during Standard Time)
Zip code: 61342

Airport Operations

Airport use: Private use. Permission required prior to landing
Activation date: 05/1979
Control tower: no
ARTCC: CHICAGO CENTER
FSS: KANKAKEE FLIGHT SERVICE STATION
Attendance: UNATNDD
Segmented circle: no

Airport Communications

WX AWOS-3 at VYS (13 nm S): 120.025 (815-223-8442)
WX AWOS-3 at RPJ (20 nm N): 125.2 (815-562-2955)

Nearby radio navigation aids

VOR radial/distance  VOR name  Freq  Var
JOTr270/38.4JOLIET VOR/DME112.3002E

Airport Services

Runway Information

Runway NW/SE

Dimensions: 1600 x 70 ft. / 488 x 21 m
Surface: turf
RUNWAY NW  RUNWAY SE
Traffic pattern: leftleft

Airport Ownership and Management from official FAA records

Ownership: Privately-owned
Owner: DEAN L. OTTERBACH
35461 2900 NORTH AVE
MENDOTA, IL 61342
Phone 815-538-7102
Manager: DEAN L. OTTERBACH
35461 2900 NORTH AVE
MENDOTA, IL 61342
Phone 773-538-7102
KEN OTTERBACK 35461 N 2900TH RD MENDOTA, IL 61342 (815) 538-7102

Additional Remarks

- OWNER DESIRES ARPT NOT BE CHARTED.
- FOR CD CTC CHICAGO ARTCC AT 630-906-8921.

Instrument Procedures

There are no published instrument procedures at 81LL.

Some nearby airports with instrument procedures:

KVYS - Illinois Valley Regional Airport-Walter A Duncan Field (13 nm S)
KRPJ - Rochelle Municipal Airport/Koritz Field (20 nm N)
C73 - Dixon Municipal Airport-Charles R. Walgreen Field (20 nm NW)
KSQI - Whiteside County Airport/Jos H Bittorf Field (25 nm NW)
KDKB - De Kalb Taylor Municipal Airport (30 nm NE)
  
Loc | Ops | Rwys | IFR | FBO | Links
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Area around 81LL (Otterbach Farm Airport)
 
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Aerial photo
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Sectional chart

 
Airport distance calculator
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From to 81LL

Sunrise and sunset
Times for 10-Aug-2026
 Local
(UTC-5)		 Zulu
(UTC)
Morning civil twilight05:3110:31
Sunrise06:0111:01
Sunset20:0301:03
Evening civil twilight20:3301:33

Current date and time
Zulu (UTC)  10-Aug-2026 12:19:01
Local (UTC-5)  10-Aug-2026 07:19:01
 
METAR
KVYS 
13nm S 		101158Z AUTO 00000KT 7SM BR CLR 23/23 A2990 RMK AO2
KRPJ 
19nm N 		101155Z AUTO 00000KT 5SM BR SCT005 OVC013 22/21 A2992 RMK AO2 60001 70024 T02210211 10221 20201
KSQI 
25nm NW 		101156Z AUTO 00000KT CLR 23/23 A2992 RMK AO2 SLP124 60001 70014 T02330233 10244 20228 53009 PWINO RVRNO $
TAF
KRFD 
38nm N 		101133Z 1012/1112 VRB03KT 5SM BR BKN009 FM101500 VRB04KT P6SM SCT012 BKN025 FM101800 VRB05KT P6SM SCT020 BKN035 FM102100 VRB06KT P6SM SCT035 BKN050 PROB30 1022/1102 VRB25G35KT 2SM TSRA BR BKN025CB FM110200 VRB06KT P6SM SCT020 BKN050 PROB30 1102/1108 VRB25G35KT 2SM TSRA BR BKN020CB
KDPA 
46nm NE 		101133Z 1012/1112 VRB04KT P6SM BKN015 FM101800 VRB05KT P6SM SCT020 BKN035 FM102100 08007KT P6SM VCTS SCT035 BKN050CB TEMPO 1022/1102 VRB25G35KT 1SM +TSRA BR BKN025CB FM110200 09006KT P6SM SCT020 BKN050 PROB30 1102/1108 VRB20G30KT 2SM TSRA BR BKN020CB
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