1LL2 in 20 seconds
Spring Brook Airport serves Seneca, US.
Spring Brook Airport (1LL2) is a privately owned and operated airport located 2 miles southwest of Seneca, Illinois, in La Salle County,,.
- Runway Information: It features one asphalt runway, 18/36, measuring 2,800 feet long by 70 feet wide,,,. Runway 18 has a right traffic pattern, while Runway 36 has a left traffic pattern.
- Ownership and Management: The airport is owned by Spring Brook Marina, Inc., and managed by James R. Thorpe,,.
- Operations: It is an operational facility activated in July 1976, with no control tower and unattended attendance,,. The airport is for private use only,.
*Sources researched: skyvector.com, airport-data.com, fltplan.com, airportguide.com, greatcirclemapper.net*
AirportRoutes · updated Jun 30, 2026
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Common questions about 1LL2
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Where is Spring Brook Airport located?
Spring Brook Airport is located in Seneca, US, at an elevation of 500 ft. Its IATA code is — and ICAO code is 1LL2.