The Marcha larga -Galdames Mendi Bira- martxa luzea is a long mountain walk originating in Galdames, located in the Biscay province of the Basque Country. The name combines Spanish and Basque, with "martxa luzea" translating to "long walk." This event is structured as a demanding hike rather than a road race.
The course features 1,800 meters of elevation gain and 1,800 meters of descent, indicating a focus on significant climbs over flat-terrain speed. A track for the event is available on Runedia, allowing participants to preview the route before starting in Galdames.