Donald D. Coski Memorial Airport
U84 · Donnelly, ID · Non-towered · Print kneeboard
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-04 · night begins 09:40 PM
| Event | Local (MDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 06:01 AM | 12:01Z |
| Sunrise | 06:34 AM | 12:34Z |
| Sunset | 09:07 PM | 03:07Z |
| Evening civil twilight Loggable night begins | 09:40 PM | 03:40Z |
Plan a flight from U84
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Advisories
NOTAMs
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Pilot reports
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Airspace hazards
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Runways
RWY 18LEFT traffic
- Heading
- 162° mag · 180° true
- Dimensions
- 2,500 × 125 ft
- TPA
- 5,900 ft MSL (≈1,000 AGL) · standard
- Surface
- Turf
- CTAF
- 122.9
Enter the left downwind (heading 342°) on the 45° at 5,900 ft MSL (≈1,000 AGL).
More details — RWY 18
- Approach obstacle
- Trees, 55 ft, 0 ft from threshold, 85 ft R of centerline
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: schematic (headings + lengths)
| Runway | Length | Your margin |
|---|---|---|
| 18/36 | 2,500 ft |
Prefer one flat page? Full runway details for U84 → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the U84 kneeboard →
Comms & NavAids
Communication frequencies
Taxi & takeoff
“Cascade”Also
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
DNJ 116.20
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| DNJ · Donnelly | VOR/DME | 116.20 · 109X | High | r098° / 5.5 NM |
Prefer one flat list? All U84 frequencies →
Charts & procedures
Airport info
Airport information
- FAA LID
- U84
- Coordinates
- 44.7255, -116.0912
- Elevation
- 4,860 ft MSL
- Magnetic variation
- 18E
- Sectional chart
- GREAT FALLS
- Airport use
- Public
- Control tower
- No
- ARTCC
- SALT LAKE CITY (ZLC)
- Flight service (FSS)
- BOISE · 122.5 · 1-800-WX-BRIEF
- NOTAM facility
- BOI
- Attendance
- UNATNDD
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1950/10
- Distance from city
- 1 W
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 under Sun & FAA night in the Weather section.
Services fuel · repairs · oxygen · attendance
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
Ownership & management 2 contacts
Remarks FAA · 10 notes
General
- NO WINTER MAINTENANCE.
- BOTH SIDES RWY: +30-80 FT TREES.
- NO TELEPHONE AVBL AT ARPT.
- FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.
Runways
- RCMD LAND RY 36 & TKOF RY 18 WHEN WIND CONDS PERMIT.
- RY 18/36 MAY NOT BE MOWED FULL WIDTH.
Obstructions
- 60 FT TREES AT 0 FT, 100 FT RIGHT.
- 45 FT TREES AT 0 FT 80 FT L; NMRS 20-80 FT TREES, 600 FT OUT ON APPCH/EXT CNTRLN.
- 65 FT TREES 600 FT ON CNTRLN AER.
Contact
- LORI CLEMENS IS THE CITY CLERK & AMGR.
Nearby airports
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Also nearby: 44ID Boulder Creek Airstrip (private) (1 NM) · ID76 Elk Ridge Airport (private) (3 NM) · ID96 Bear Air Airport (private) (4 NM) · 2ID5 Splan Airport (private) (5 NM) · ID59 Flying A Ranch Airport (private) (6 NM)
About U84
Donald D. Coski Memorial Airport (U84) is an airport in Donnelly, ID, at 4,860 ft MSL. It has 1 runway, the longest 2,500 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for U84, refreshed from the Aviation Weather Center and FAA NASR.
Does U84 have a control tower?
No. Donald D. Coski Memorial Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at U84?
Donald D. Coski Memorial Airport has 1 runway; the longest is 2,500 ft. See the Runways section for headings, surface, and lighting.
Where is U84?
Donald D. Coski Memorial Airport is in Donnelly, ID, at an elevation of 4,860 ft MSL. Coordinates: 44.7255, -116.0912.
Fly out of U84 often?
Save U84 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.
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 U84 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.