Stage 6 of the 2023 Vuelta España Femenina was a medium mountain stage that took place on .

The stage started in Castro-Urdiales and finished in Laredo, starting at with an expected finish at (average speed of 36 km/h).

The total distance of the stage was 106.3 km. The stage included 0 categorized climb(s) and 0 intermediate sprint(s), and had a total elevation gain of 1582 m, and a total descent of -1616 m.