Brindabella Challenge kicks off

The Brindabella Challenge, Australia's largest variety cycling event, kicked off Friday and will run through December 9. The Challenge includes an adventure races, a navigation event, a mountain bike race and social mountain bike rides and skills practice. The event is named for the hills that ring the city.

One the competitive highlights is the Urban Polaris, on Sunday, December 2, with up to 600 participants expected to take on what will be the final Polaris event. In the Urban Polaris, bikes come to the streets, tracks, forests and parks of the nation's capital in Australia's biggest one day mountain bike navigation event. Teams of two riders (and a limited solo category) have seven hours to visit as many checkpoints as they can which are in buildings, up mountains, deep in forests and around tourist icons.