The GranDiagonal by EVOC is an unsupported road cycling adventure taking place from June 13 to 21, 2026, across Portugal. This single-stage event covers a distance of 1,000 km with an elevation gain of 16,500 meters.

Designed for experienced cyclists, the race challenges participants to complete the entire route unsupported, emphasizing endurance and self-sufficiency. The course traverses diverse Portuguese landscapes, offering a unique and demanding cycling experience.