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Yes, indeed. According to GreekReporter.com:
A new half marathon race, the Poseidon Challenge, will be held for the first time on October 2 at the southest part of Attica, at Sounio Cape. The race will link the Temple of Poseidon with the ancient theatre of Thoricus near Lavrio, the most ancient theatre in Greece.
If half-marathons are special enough for you, you might enjoy going there in October.