One of Australia's longest-running mountain bike marathons returns to the Highlands on November 7 and 8.

It offers riders the opportunity to compete across some of the state's best trails.

In 2015, The Fling offers riders the choice of four race distances:

The Full Fling (approximately 110km)

Half Fling (approximately 55km)

100 Mile Fling (approximately 160km)

A new race called the Some Fling (23km).

The Some Fling is aimed at growing the number of junior racers, new racers and for those who prefer a sprint distance.

The Highland Fling is supported by Wild Horizons.

Huw Kingston from Wild Horizons said organisers had noticed a significant increase in the number of junior riders wanting to challenge themselves with serious racing.

"These next generation Flingers have literally grown up with us - doing the skills clinics, the Kid's Fling and the Casual Fling.

"They aren't ready to tackle a Half Fling quite yet, but definitely need that next level," he said.

The CamelBak Highland Fling will once again be the final round of the 2015 Maverick Marathon Series.

For more details, go to www.wildhorizons.com.au/highland-fling