Stage 4 of the 2025 Tour de Romandie was a mountain stage that took place on .

The stage started in Sion and finished in Thyon 2000, starting at with an expected finish at (average speed of 35 km/h).

The total distance of the stage was 124.4 km. The stage included 0 categorized climb(s) and 0 intermediate sprint(s), and had a total elevation gain of 3970 m, and a total descent of 2393 m.