Seixas, riding for Décathlon CMA CGM, launched his decisive attack 6 kilometers from the summit of the day's main climb, the San Miguel de Aralar, and completed a 26-kilometer solo effort to reach the finish line in Mendukilo. The victory follows his dominant performance in the opening time trial.
The French rider now holds a commanding two-minute advantage over his nearest rivals in the general classification, with Danish cyclist Matias Skjelmose finishing second in the stage, more than a minute behind Seixas.