The Collontrek is a high mountain race of about 22 km
(1,250 m of positive altitude difference and 1,230 m of negative altitude difference).
Its route follows the old paths travelled for centuries by neighbouring populations (farmers, smugglers,.....) in the Upper Valpelline (Italy) and Val d'Hérens (Switzerland), who have preserved their common languages and traditions (Franco-Provençal patois, battles or queen fights,...).
The trail starts at the top of the Place-Moulin dam, 1,989 m in the municipality of Bionaz (Valle d'Aosta-Italy), crosses the Italian-Swiss border at Col Collon, 3,080 m and ends at 2,006 m in Arolla, a hamlet in the municipality of Evolène (Valais-Suisse).
This is a stage of the Tour du Cervin and the Tour des Grands Barrages