OLYMPIC marathon runner Jess Trengove has a simple remedy for the post-Rio blues.

"I've kept myself busy," the Australian distance star said, who will compete in the 10km event at the Tropical Journey's Great Barrier Reef Marathon Festival on Sunday.

"Beating the post-Olympic blues was all about keeping myself occupied. It's such a build up to the Olympics and a gruelling preparation, so I've had some other work on, school visits and talks.

"It's just so nice to be here in Port Douglas and get away from it all now."

Trengove came home in 22nd position at the Olympic Games in Brazil, beating her London placing of 39th. She flew home in the women's marathon in 2:31:44 despite having an injury-interrupted preparation to enhance her reputation as one of the country's brightest athletes.

"I was really pleased with how the entire athletics team performed," she said.

"Personally, It was great to be able to improve on my London placing as I had my challenges heading in.

"I was aiming for a top 20 finish so I fell a couple of places short of that, but when I crossed the line I was absolutely empty. I didn't have much more to give, so from that perspective you can't ask for much more from yourself."