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Reference data only — not for flight planning or navigation. Verify with official sources (AIP, NOTAMs, ATC). Full disclaimer

Castle Airport (KMER/MER) — Merced, United States

At a glance

Operating hours
15:00–00:00 UTC
Fuel
100LL, Jet A, Jet A-1
Tower
118.175
Runways
13/31
Elevation
191 ft

Times in UTC. Reference only: verify with the AIP and NOTAMs.

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83% Data Complete 43 of 52 points
Missing: Contacts
Section Breakdown
Basic Info 7/7
Runways 4/4
Frequencies 4/4
Operations 2/2
Fuel 1/1
Contacts 0/2
Additional Info 3/10
Observed Activity · Oct 27
35 aircraft observed within 6 NM · 4 on the ground · busiest hour 21:00Z
2026-10-142026-10-27
Distinct ADS-B aircraft seen within 6 NM below 10,000 ft AGL per UTC day · community-feed coverage varies · not official movement totals
Data last updated:
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Basic Airport Information

  • ICAO: KMER
  • Name: Castle Airport
  • Type: medium_airport
  • Category: Domestic
  • Latitude: 37.380501
  • Longitude: -120.568001
  • Elevation: 191 ft
  • Country: United States
  • Municipality: Merced
  • IATA Code: MER
  • FAA Code: N/A
  • FIR: N/A
  • Timezone: America/Los_Angeles
  • Distance from City: N/A km
  • VFR: Yes
  • IFR: No

Runways

Runway 13/31

  • Designation: 13/31
  • Dimensions: 3597x46m
  • Surface: PEM
  • PCN: N/A
  • Lighting: Lighted
  • NAVAIDs: N/A
  • Approach Types: N/A
  • Remarks: N/A

Frequencies

  • Tower: 118.175, 235.775 MHz
  • Ground: 133.575 MHz
  • Operations: 118.175, 122.950 MHz
  • Traffic/Approach: N/A
  • ATIS: 124.475 MHz

Operation Hours

Monday 15:00 – 00:00
Tuesday 15:00 – 00:00
Wednesday 15:00 – 00:00
Thursday 15:00 – 00:00
Friday 15:00 – 00:00
Saturday 15:00 – 00:00
Sunday 15:00 – 00:00
  • Extra Hours On Request: Not recorded
  • Remarks: N/A

Contacts

  • AIS Tel: N/A
  • ARO Tel: N/A
  • MET Tel: N/A
  • Admin Tel: +1 209-617-5399
  • Health Tel: N/A
  • Police Tel: N/A
  • Authorities Tel: N/A
  • Website: N/A
  • Remarks: N/A

Slots / PPR

  • Slot Required: Not recorded
  • PPR Required: Not recorded
  • PPR Contact: N/A
  • Remarks: N/A

Fuel Information

  • Fuel Type: 100LL
  • Price/L: N/A
  • Last Updated: N/A
  • Remarks: N/A
  • Fuel Type: Jet A
  • Price/L: N/A
  • Last Updated: N/A
  • Remarks: N/A
  • Fuel Type: Jet A-1
  • Price/L: N/A
  • Last Updated: N/A
  • Remarks: N/A

Immigration

  • Port of Entry: Not recorded
  • APIS Required: Not recorded
  • GAR Required: Not recorded
  • Remarks: N/A

Airport Services

No services listed for this airport yet.

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United States Permit Requirements

Fast Landing: 1d
  • Overflight Permit: No
  • Landing Permit: Conditional
  • Overflight Lead Time: N/A
  • Landing Lead Time: 60 minutes minimum (eAPIS manifest before departure); recommend 24-48 hours for CBP port notification
Private / GA Operations:

No permits required for private non-revenue flights. eAPIS manifest mandatory for all international arrivals/departures.

View Full United States Permit Details

Active NOTAMs

10/004
caution
Navaid/lighting unserviceable
NAV ILS RWY 31 GP U/S
2026-10-16 19:02 UTC 2026-11-20 23:59 UTC
6/6693
caution
Navaid/lighting unserviceable
IAP CASTLE, ATWATER, CA. ILS OR LOC RWY 31, AMDT 3... S-LOC MINIMUMS NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS, HYP DME OUT OF SERVICE. 2610012015-2611012015EST
2026-10-01 20:15 UTC 2026-11-01 20:15 UTC
10/001
info
OBST TOWER LGT (ASN 2019-AWP-4993-OE) 372208N1203949W (4.6NM W MER) 304FT (155FT AGL) U/S
2026-10-05 13:08 UTC 2027-01-03 23:59 UTC

+2 more active NOTAMs

NOTAMs received from the FAA NOTAM feed (last message 2026-10-28 13:10 UTC). This list is built from the feed as NOTAMs are issued and is not checked against the FAA's full list: confirm with FAA NOTAM Search before flight.
View all NOTAMs on Map

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Nearby Airports

CA32 San Joaquin Airport 49 NM 0CA0 Pom Wonderful Airstrip 64 NM 5CA7 Agro-West Airport 65 NM 65CL Al Divine Airport 65 NM 0Q4 Selma Airport 65 NM CA41 Quinn Airport 65 NM CA40 Central Valley Aviation Inc Airport 67 NM K3O8 Harris Ranch Airport 70 NM

Compare KMER with CA32 side by side →

Airport History

No milestones recorded for Castle Airport yet. Know when it opened, who built it or a notable event? Add it with a source.

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Frequently Asked Questions
What are the operating hours of KMER?
Castle Airport operates from 15:00 to 00:00.
What is the tower frequency at KMER?
The tower frequency at Castle Airport is 118.175, 235.775 MHz.
What fuel is available at KMER?
Castle Airport offers 100LL, Jet A, Jet A-1.
Does KMER require landing permits?
It depends on the flight. No permits required for private non-revenue flights. eAPIS manifest mandatory for all international arrivals/departures. Permit details for United States
Where is KMER located?
Castle Airport (KMER) is located in Merced, United States.
What is the IATA code for KMER?
The IATA code for Castle Airport is MER.
How long is the runway at KMER?
The main runway at Castle Airport (13/31) measures 3597x46m.
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