William Robert Johnston Municipal Airport
M90 · Mendota, CA · 162 ft elevation · var 15E · Non-towered
Airport information
- FAA LID
- M90
- Coordinates
- 36.7586, -120.3710
- Elevation
- 162 ft MSL
- Magnetic variation
- 15E
- Sectional chart
- SAN FRANCISCO
- Airport use
- Public
- Control tower
- No
- ARTCC
- OAKLAND (ZOA)
- Flight service (FSS)
- RANCHO MURIETA
- NOTAM facility
- RIU
- Attendance
- UNATNDD
- Segmented circle
- Yes
- Wind indicator
- yes
- Activated
- 1957/08
- Distance from city
- 0 E
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 | 05:12 AM | 12:12Z |
| Sunrise | 05:43 AM | 12:43Z |
| Sunset | 08:24 PM | 03:24Z |
| Evening civil twilight Loggable night begins | 08:54 PM | 03:54Z |
Plan a flight from M90
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 · 146°
- Pattern
- left (turns left)
- TPA
- 1,200 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 15 at 1,200 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 15/33
3,499 ft × 50 ft · Asphalt (Failed)- Heading
- 146° mag · 161° true
- Markings
- basic
- Traffic pattern
- Left
- Heading
- 326° mag · 341° true
- Markings
- basic
- Traffic pattern
- Right
- Approach obstacle
- Bldg, 17 ft, 423 ft from threshold, 190 ft L of centerline — 13:1 slope to clear · penetrates the 20:1 visual approach surface
- Displaced threshold
- 777 ft
| Runway | Length | Your margin |
|---|---|---|
| 15/33 | 3,499 ft |
Communication frequencies
| Service | Frequency | Notes |
|---|---|---|
| CTAF | 122.9 |
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| PXN · Panoche | VORTAC | 112.60 | r066° / 19.8 NM |
| HYP · El Nido | VOR-DME | 114.20 | r162° / 27.7 NM |
| CZQ · Clovis | VORTAC | 112.90 | r239° / 27.8 NM |
| NLC · Lemoore | TACAN | 113.30 | r306° / 31.6 NM |
| ROM · Priest | VOR | 110.00 | r005° / 39.7 NM |
Chart Supplement FAA A/FD
Open PDF ↗Preview Chart Supplement
VFR sectional
Services
- Parking
- tiedowns
Ownership & management
Remarks FAA
- FOR CD CTC NORCAL APCH AT 916-361-0516.
- PARL TWY ROUGH/UNEVEN SFC; EXTSV ASPH RPR AND PATCHING.
- ARPT CLSD UNTIL FURTHER NOTICE.
- CITY MANAGER X 109.
- MARKINGS FADED.
- MARKINGS FADED.
- APCH RATIO TO DSPLCD THR 50:1.
- RWY 15/33 IS POTHOLED WITH AREAS OF COLLAPSED PAVEMENT.
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 M90 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 M90
William Robert Johnston Municipal Airport (M90) is an airport in Mendota, CA, at 162 ft MSL. It has 1 runway, the longest 3,499 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for M90, refreshed from the Aviation Weather Center and FAA NASR.
Does M90 have a control tower?
No. William Robert Johnston Municipal Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at M90?
William Robert Johnston Municipal Airport has 1 runway; the longest is 3,499 ft. See the Runways tab for headings, surface, and lighting.
Where is M90?
William Robert Johnston Municipal Airport is in Mendota, CA, at an elevation of 162 ft MSL. Coordinates: 36.7586, -120.3710.
Fly out of M90 often?
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