Davos X-Trails Diamond is a high-alpine trail race held on July 25, 2026, starting and finishing at the Davos Sports Centre in Davos, Canton Grisons, Switzerland. The course covers 68km with 3,309m of gain (49 m/km) across three mountain passes — Scalettapass, Sertigpass, and Fanezfurgga — reaching a highest point of 2,739m. The defining course feature is its descents: the biggest drops 938m over 5.3 km at a -17.8% average gradient — aggressive technical alpine terrain on rocky, potentially snow-covered trail.
A 13.3 km opening climb (1,008m at 7.6% average) sets the tone; the course then alternates between sustained passes and steep rocky drops. Entry costs CHF 169 (€2.73/km); the Swiss Runners Ticket (free national rail Jul 16–Aug 3) is included. Zürich (ZRH) is 2–2.75 hours by train. Rebranded in 2022 but built on 35+ years of Swiss Alpine Marathon history, drawing 199 finishers in 2024. A bail-out option at km 43 is available. It suits technically experienced mountain runners prepared for genuine high-alpine conditions including potential July snow.