Competitors running Raad-ny-Foillan
Teams of 10 will tackle a 100-mile course today as they Race the Sun.
It's the tenth year the event has taken place on the Island, with thousands of pounds being raised for charity.
Competitors aim to complete a clockwise lap of the Island around the Raad-ny-Foillan before sunset.
The race got underway at around 5.10am this morning.
One of the organisers is Lisa Motley.
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