 No changes were made to the mountains classification , where points were awarded to the riders that reached the top of the most difficult ascents first . The climbs were categorised as either hors catégorie ( English : beyond category ) , first , second , third , or fourth @-@ category , with more points available for the higher @-@ categorized climbs . The overall leader wore a polka dot jersey . Double points were awarded on the summit finishes on stages 5 , 15 , 18 and 20 . 
