Highway 42 is the highest-numbered main road on St. Thomas, U.S. Virgin Islands.
It serves Mahogany Run Golf Course, a major golf course on the island, and provides access to world-famous Magens Bay beach from the eastern part of St. Thomas.
Its eastern terminus is with Highway 38 near the town of Tutu, and the road runs exactly 3 miles (5 km) to Highway 35 near Magens Bay.
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