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Half marathons in Long Island (2026-27)

1 upcoming half marathons in Long Island in the next 12 months. The next is Great South Bay Run on Saturday October 9 in Bay Shore, from $34.

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• Sat9Oct

  Great South Bay Run

  Sat Oct 9 · 7:30 AM · Bay Shore · Long Island

  5K10KHalf marathon

  from $34Reg. closed