Airport information
- FAA LID
- 66S
- Coordinates
- 48.5182, -116.8221
- Elevation
- 2,484 ft MSL
- Magnetic variation
- 20E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SEATTLE (ZSE)
- Flight service (FSS)
- BOISE
- NOTAM facility
- BOI
- Attendance
- JUN-AUG THU-MON 0800-1700
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1949/09
- Distance from city
- 3 N
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (PDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 04:03 AM | 11:03Z |
| Sunrise | 04:45 AM | 11:45Z |
| Sunset | 08:53 PM | 03:53Z |
| Evening civil twilight Loggable night begins | 09:35 PM | 04:35Z |
Plan a flight from 66S
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.9 — confirm the click sequence in the Chart Supplement ↗
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 15
- Pattern
- right (turns right)
- TPA
- 3,500 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the right downwind for Rwy 15 at 3,500 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 15/33
3,100 ft × 120 ft · Turf (Good)- Heading
- n/a
- Traffic pattern
- Right
- Approach obstacle
- Tree, 85 ft, 0 ft from threshold, 90 ft R of centerline
- Heading
- n/a
- Traffic pattern
- Left
- Approach obstacle
- Tree, 65 ft, 0 ft from threshold, 95 ft L of centerline
| Runway | Length | Your margin |
|---|---|---|
| 15/33 | 3,100 ft |
No published frequencies or nearby navaids for 66S.
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
Ownership & management
Remarks FAA
- ARPT EXISTED PRIOR TO 15 MAY 59.
- NO WINTER MAINTENANCE.
- RWY 15/33 NO LINE OF SIGHT BTN RWY ENDS.
- WATCH FOR SPRINKLERS ON RY.
- ARPT ATTENDED BY CARETAKER DURG SUMMER MONTHS.
- SEAPLANE OPERATIONS CONDUCTED IN BAY NORTH & ADJACENT TO ARPT; MONITOR CTAF.
- HEAVY SNOWMOBILES ACTIVITY DURING WINTER MONTHS.
- FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
- 15/33 EDGES & THRS MKD WITH WHITE ROCKS.
- BOTH RWY ENDS HAVE 50-70 FT TALL TREES. AFCTS EITHER APCH OR DEP.
- RY 15 +100 FT TREE 310 FT FM RY END 150 FT R; +12 FT ROAD 40 FT ON CNTRLN; +120 FT TREE 200 FT FM RY END 180 FT L; +30 FT TREE 125 FT FM RY END ON CNTRLN; +25 FT BLDG AT 90 FT; 60 FT L.
Nearby airports
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 66S in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.
About 66S
Cavanaugh Bay Airport (66S) is an airport in Coolin, ID, at 2,484 ft MSL. It has 1 runway, the longest 3,100 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 66S, refreshed from the Aviation Weather Center and FAA NASR.
Does 66S have a control tower?
No. Cavanaugh Bay Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 66S?
Cavanaugh Bay Airport has 1 runway; the longest is 3,100 ft. See the Runways tab for headings, surface, and lighting.
Where is 66S?
Cavanaugh Bay Airport is in Coolin, ID, at an elevation of 2,484 ft MSL. Coordinates: 48.5182, -116.8221.
Fly out of 66S often?
Save 66S as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.