KHYI
San Marcos Regional Airport · San Marcos
ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
597 ft / 182 m
Transition Altitude
18,000 ft
Primary Channel
A/D 119.00 MHz (AUSTIN APP/DEP)
Runway Summary
08/266,330 ftAsphaltLIGHTED
13/315,603 ftAsphaltLIGHTED
17/355,213 ftAsphaltLIGHTED
Mission Briefing & Tools
Direct calculators and pre-filled resources for this airport.
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Buy me a beerBriefing for San Marcos Regional Airport (KHYI), United States. This facility features 3 active runways with an elevation of 597 ft. Verified ILS frequencies are available for precision approaches.Maintain a Transition Altitude of 18,000 ft for altimeter reset.
Full Name
San Marcos Regional Airport
ICAO / IATA
KHYI / —
Municipality
San Marcos
Country
Region
US-TX
GPS Coordinates
Transition Altitude
18,000 ft
Official Website
—
Wikipedia
Runway 08 / 26
LIGHTED
Length: 6,330 ft / 1,929 m
Surface: Asphalt
Heading: 87.8° / 267.8°
Surface: Asphalt
Heading: 87.8° / 267.8°
RWY 08
No ILS
RWY 26
No ILS
Runway 13 / 31
ILSLIGHTED
Length: 5,603 ft / 1,708 m
Surface: Asphalt
Heading: 132.9° / 312.9°
Surface: Asphalt
Heading: 132.9° / 312.9°
RWY 13
108.70 MHz
ID: RUM | CRS: 126°
RWY 31
No ILS
Runway 17 / 35
LIGHTED
Length: 5,213 ft / 1,589 m
Surface: Asphalt
Heading: 177.9° / 357.9°
Surface: Asphalt
Heading: 177.9° / 357.9°
RWY 17
No ILS
RWY 35
No ILS
A/D AUSTIN APP/DEP
119.00 MHz
AWOS AWOS 3
120.83 MHz
CLD CLNC DEL
121.35 MHz
UNIC CTAF/UNICOM
123.05 MHz
Data Source: OurAirports · Technical Briefing Jan 2026
ILS Data Source: AIP / FAA NASR Cycle Verified