Tonopah Test Range Airport (IATA: XSD, ICAO: KTNX, FAA LID: TNX), at the Tonopah Test Range (Senior Trend project site PS-66) is 27 NM (50 km; 31 mi) southeast of Tonopah, Nevada and 140 mi (230 km) northwest of Las Vegas, Nevada. It is a major airfield with a 12,000 ft × 150 ft (3,658 m × 46 m) runway, instrument approach facilities, and nighttime illumination.