However , the altitudes of the climbs are measured from sea level ( 14 ) .
Most of the trials are located at high mountains in the French Alps or Pyrenees , meaning that the riders did not start their races at sea level .
The altitudes of the climbs are measured from sea level ( 14 ) .
Most of the trials are located at high mountains in the French Alps or Pyrenees , meaning that the riders did not start their races at sea level .