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The Pilots Desk
Small airport

J Maddock Airport

ICAO IL38🇺🇸 Big Rock
Coordinates
41.7670°N, 88.5320°W
Elevation
705 ft (215 m)
Type
Small airport
Region
US-IL
Time zone
Chicago(UTC-05:00)
Magnetic variation
3.5° W

Daylight today(Jul 21, 2026, local time)

Civil dawn
05:06
Sunrise
05:38
Sunset
20:24
Civil dusk
20:57

About 14h 46m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.

About J Maddock Airport

J Maddock Airport is a small airport in Big Rock, United States. It sits at an elevation of 705 ft (215 m) and has 1 runway, the longest 2,600 ft / 792 m. It observes America/Chicago local time. The nearest airport is Aurora Municipal Airport (AUZ), about 2.5 nm to the e.

Summary generated from this airport’s structured data — reference only.

Map

Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.

Runways (1)

RunwayLengthWidthSurfaceLightingStatus
E / W2,600 ft / 792 m70 ftTurf-gUnlitOpen

Airspace in this area(2)

NameClassTypeFloorCeiling
CHICAGO CLASS B AREA FClass BControlled4000 ft MSL10000 ft MSL
CHICAGO, AURORA MUNI AIRPORT CLASS DClass DControlledGND3200 ft MSL

Approximate bounding-box match from OpenAIP · all United States airspace. Reference only — consult official charts for exact boundaries and status.

Tall obstacles nearby

ObstacleHeight AGLTop (MSL)Lit
Obstacle860 ft

Tallest obstacles within ~10 nm. Data via OpenAIP. Reference only — consult official charts.

Nearby airports

Great-circle distance and true bearing from J Maddock Airport.

Live tracking (FR24) Open in Maps
🇺🇸 More airports in United States📘 Flying in the United States: a pilot's guide

Frequently asked questions

Where is J Maddock Airport located?

J Maddock Airport is small airport located in Big Rock, United States, at an elevation of 705 ft (215 m).

How many runways does J Maddock Airport have?

J Maddock Airport has 1 runway, the longest being 2,600 ft / 792 m.

What time zone is J Maddock Airport in?

J Maddock Airport is in the America/Chicago time zone (UTC-05:00).

What is the magnetic variation at J Maddock Airport?

The magnetic variation (declination) at J Maddock Airport is approximately 3.5° W, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.

What airports are near J Maddock Airport?

The nearest airport to J Maddock Airport is Aurora Municipal Airport (AUZ), about 2.5 nm to the e, followed by Oakfield RLA Airport and Gord Airport.

Is the information on this page suitable for flight planning?

No. J Maddock Airport data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.