Before the 2003 fires, Mount Stromlo had some of the best and oldest mountain bike trails in Australia. In May 2006 the trails were rebuilt and made bigger. Stromlo Forest Park now has more than 35 km of cross country single trail, a Four-Cross course, several observed trials areas and a downhill track. The 2009 Union Cycliste Internationale Mountain Bike and Trials World Championships were held at Mount Stromlo. About 30,000 visitors from up to 40 countries came to the event. More than 750 of the world's top riders took part in the four mountain bike sports of Cross Country, Downhill, Four Cross and Observed Trials.