A race starting and ending in Courmayeur, Italy. It follows the Alta Via 2 along the southern rim of the Aosta Valley and the Alta Via 1 along the northern rim. Total distance is 336km (200 miles) and elevation gain is over 24,000m (78,000ft.) with an equal drop. It is a single stage race with a time limit of 150 hours.

The official website of the race is at http://www.tordesgeants.it/

I previously did this race in 2010. Photos from that race are here: https://pbase.com/chrrrris/tor_des_geants_2010