Running a marathon at the North Pole with huskies may seem remote from kangaroos in Canberra but there is a connection.

Canberra animal activist Marcus Fillinger this week completed the world's coolest marathon at the North Pole in minus 33-degree temperatures with his Siberian huskies Blue and Duro.

Marcus Fillinger, who lives on a property at Williamsdale on the ACT border, went to "the end of the earth'' - the North Pole - to promote his anti-kangaroo culling message.

Fillinger said it was the first time that dogs from anywhere in the world had completed the gruelling 42.2km marathon across snow and ice in sub-zero temperatures.

He was one of 60 international competitors in this year's event. Fillinger completed the 10 laps of 4.2km in nine hours and 50 minutes, including three scheduled, 40-minute dog feeding breaks.