Saint-Gaudens, France, July 12 (DPA) The ninth stage of the 2009 Tour de France got underway Sunday in the Pyrenean city of Saint-Gaudens with Italian Rinaldo Nocentini still the surprise leader of the race.

The 160.5km course to Tarbes, the last of three stages in the Pyrenees Mountains, will take the 172 riders left in the race over two formidable climbs.

First they tackle the 12.3km ascent to the Col d'Aspin. With an average slope of 6.4 per cent, the climb is rated Category 1 in difficulty.

Less than 30km farther on comes one of the legendary climbs of the Tour de France, up to the Col du Tourmalet, a gruelling 17.1km at an average gradient of 7.4 per cent.

The Tourmalet, which has been climbed 76 times in previous Tours, is rated Beyond Category in difficulty, the highest rating. However, after the Tourmalet more than 70km remain in the stage, which diminishes its tactical importance for the outcome of the Tour.