Midland native Justin Arnosky isn't the hard-core triathlon competitor that he was a few years ago. But he's found a new athletic outlet that incorporates two-thirds of the triathlon: the swim-run.

It's late at night, you're in a bar, and the alcohol is flowing. What's more natural than to trace a route across an archipelago on a napkin and challenge your mates to a race – losers buy dinner?

Tell someone youre doing a Swim Run, and people think youre kind of doing a triathlon, but skipping the bike portion. Which is like saying tennis is about batting a ball around. Its a whole lot more ...

Scarborough resident Zeki Gurcan (right) and teammate Ivan Puchades (left), male short course winners of the Odyssey Swim Run Casco Bay Islands on Aug. 8. The race consisted of running and swimming ...