The CCC is the marquee sister race of the UTMB, covering the final 101 kilometers of the Tour du Mont-Blanc from Courmayeur through the Swiss village of Champex-Lac to Chamonix. As a UTMB World Series Finals event, it attracts the deepest field in 100 km trail running. The course crosses three countries and features relentless Alpine climbing, technical descents, and a legendary midnight finish in Chamonix town center.