In Jenkin Road there was a party atmosphere as amateur cyclists tried their hand at the famous climb.
They were urged on by crowds of people who cheered when they made it or groaned when they failed on the steep gradient.
In the park at the top of the hill there was a big screen showing the action from Stage 2. There were fairground rides, beer tent, food and drink stalls and activities for children.
Families were sitting having picnics and enjoying the sunshine.
Keen cyclist Fred Denton, 57, and his wife Elizabeth, 54, had travelled to Wincobank all the way from Glasgow.
He is cycling Stage 18 in the Pyrenees later this month.
He said: “It’s a fantastic atmosphere here. It really is superb. We’ve got a great view and everyone is really getting into the spirit of it.”