 The crucial part of the race was the final 1 @,@ 300 @-@ metre ( 4 @,@ 300 ft ) climb of the Mur de Huy , which has an average gradient of 9 @.@ 6 % . The first 400 @-@ metre ( 1 @,@ 300 ft ) section of the climb has a gradient less than 7 % ; after this it increases to about 10 % . The steepest section comes after 800 metres ( 2 @,@ 600 ft ) with an S @-@ bend . The steepest part of the climb has a gradient of about 24 % ; many past races have been won with attacks at this point . The finish line came at the very top of the climb . 
