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LOST RIVER - Airport Diagram
LiveATC.net: Live Air Traffic - From Their Headsets to You

W12
Local W12
LOST RIVER
PublicPUB

5 miles NW of MAZAMA, WA, US
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LiveATC.net: Live Air Traffic - From Their Headsets to You
Status
Operational
Coordinates
48° 38' 59"N 120° 30' 07"W
Elevation
2415' MSL
Pattern Alt
3415' MSL
Mag Variation
15°E
Declination
21°E
Fuel
None Listed
FSS
SEATTLE (SEA)
Sectional
SEATTLE
ARTCC
SEATTLE (ZSE)
Data Effective
5/14/26-6/11/26
KS52 (19nm) VFR
6:55 PM PDT  
Overcast 12,000'
Broken 9,000'
10sm
58°F
32°F
29.94"Hg
320° 9kts
Gusts 16kts
AO2 T01431002
METAR KS52 150155Z AUTO 32009G16KT 10SM BKN090 OVC120 14/00 A2994 RMK AO2 T01431002
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Common

CTAF 122.9

FAA A/FD Pages

Terminal Area Forecast

CYYF (60nm)
Thu, 5/14 5:40 PM PDT
Thu, 5/14 6:00 PM PDT - Fri, 5/15 6:00 AM PDT
VFR
6:00 PM PDT - 10:00 PM PDT
Broken 8,000'
6sm
320° 10kts
VFR
Becoming 10:00 PM PDT - 6:00 AM PDT
Scattered 8,000'
6sm
320° 10kts
TAF CYYF 150040Z 1501/1513 32010KT P6SM BKN080
   BECMG 1505/1507 SCT080 RMK NXT FCST BY 150700Z
W12
EffectiveExpiresCategoryNOTAM
Domestic
5/15/26
1300Z
5/16/26
0400Z
Runway!SEA 05/234 W12 RWY 11/29 CLSD 2605151300-2605160400
3/31/26
2339Z
5/31/26
2359Z
Runway!SEA 03/460 W12 RWY 11/29 IRREGULAR SFC 2603312339-2605312359
No
UNATNDD
LOST RIVER ARPT ASSOC
16 MERCER ROAD
MAZAMA, WA 98833
Phone: (206) 321-2447
PATRICIA HEGLUND
2 MERCER ROAD
MAZAMA, WA 98833
Phone: 608-317-7850
SEATTLE FSS (SEA)
Toll Free: 1-800-WX-BRIEF
SEA
--
--
N/A
Yes
No
No
None
NOT a Landing Rights Airport
NOT an Airport of Entry
None
None
None
None
None

Runway 11/29

3150 ft. x 85 ft.
TURF GRVL  
Fair 
NONE 
 
 
-- 
-- 
-- 
-- 
  Runway 11 Runway 29
True Heading Not ListedNot Listed
Traffic Pattern Right
Markings NONE
Markings Condition
Latitude N/A N/A
Longitude N/A N/A
Elevation -- --
Threshold Crossing Height -- --
Visual Glide Path Angle -- --
Visual Slope Indicator -- --
Approach Lights
Centerline Lights
Runway End Identifier Lights
A110-1ARPT CLSD 1 NOV THRU 1 APR.
A110-2WATCH FOR VEHICLES AND PEDESTRIANS ON RWY.
A110-3ACCESS ROADS BOTH SIDE OF RWY IN PRIM SFC, VEHICLES CROSS RWY AT VARIOUS LOCATIONS, PRIMARILY AT RWY ENDS.
A110-4FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
A42-11_MARKMARKED (PAINTED) ON CONCRETE PAD.
A57-1111/29 +60 FT TREES IN PRIMARY SFC BOTH SIDES RY.
E111FILED FOR RECORD KEEPING PURPOSES ONLY.
LOST RIVER (IATA: W12) is a public airport located in MAZAMA, WA, US.