 At the base of the Col de la Croix de Chaubouret , Team Sky and BMC Racing Team came to the head of the peloton . Sky 's Lars Petter Nordhaug led the peloton through the first 4 km ( 2 @.@ 5 mi ) of the climb , dropping Michael Matthews ( Orica – GreenEDGE ) along the way . Warren Barguil ( Giant – Alpecin ) crashed at the base of the climb ; though he eventually finished the stage , he was unable to return to the main group . After Nordhaug pulled off , his teammate Nicolas Roche took over . His turn at the head of the group caused several riders to be distanced , including Talansky , Majka and Wilco Kelderman ( LottoNL – Jumbo ) . 
