Zalla-Balmaseda-Zalla is a 14K road race in Bizkaia, Basque Country, Spain, following a straightforward out-and-back course: start in Zalla, proceed to Balmaseda, and return to Zalla for the finish. The current listing shows the distance as approximately 14.3 km on asphalt, featuring 235 meters of elevation gain, classifying it as a short road race with significant climbing. It takes place in December, with the primary race commencing at 11:30 a.m.
The course is a Zalla-Balmaseda-Zalla run, not a city circuit. One account mentions the initial ascent towards Gobeo, where a lead group of four runners had already formed by the second kilometer. Club Enkarterri Triatloi is the organizing body, and a recent running attracted about 300 participants. The event originated in December 1991, established by Pedro Galarza, who is also associated with the Galarleiz alpine race. It was absent from the athletics calendar for a period after its initial seven editions before being revived as a local race for the Enkarterri region.