stage 4: Sion - Sion 149.2 km
The first kilometres roll trough the Rhône Valley before the route turns right for a 8.9 kilometres climb at 9.4% to the thermal spa centre of Ovronnaz. The middle section of 3 kilometres is toughest with an average gradient of 11.5%, although the last 3 kilometres are not for the faint of heart either – 9.8%. The riders can take comfort as the steepest slopes of the day are behind them when they reach the summit at kilometre 17.7.
After approximately one hour the route once again moves through Sion only to follow the Rhône further upstream. At 65 kilometres the riders take a right-hander and hit the second climb, which goes to mountain village Vercorin. It’s a steady ascent of 9.6 kilometres with an average gradient of 8.1%.
Straight after the descent the road once again points uphill. The climb to Nax is also steady, yet less long and less steep – 6.6 kilometres at 6.1%. Hardly time for a breather at the top though, as shortly it’s all systems go again on the road to Suen. The first 2 kilometres go up at 8%, but the slopes flattens out and the 5.7 kilometres climb is averaging 5.2%.
More than 55 kilometres remaining and one climb left. The ascent to Les Collons amounts to 13.1 kilometres, so this is the longest drag up of the day. The average gradient is 6.5% with both the first and the last five kilometres at over 7%.
From Les Collons to the line in Sion is 27.4 kilometres. This is mostly on descent with some minor kicks up, while the last kilometres in the Rhône Valley are on the flat.