The 2026 UTMB Mont-Blanc operates from August 24 to 30, acting as the UTMB World Series Finals. The 100M flagship event requires traversing 174km and 9,900m+ of elevation across France, Italy, and Switzerland. Execution demands strict compliance with MyUTMB registration timelines, adherence to designated cutoff metrics, and precise logistical planning for cross-border point-to-point starts. The ancillary events (CCC, OCC, TDS) mandate distinct valley transit operations.