Volcano Gravel Day is a full-day, 88 km off-road ride from Santader that links extinct volcanoes with beech forest. It packs about 1,600 m of climbing into one day, on tracks that vary from firm and fast to loose and rough in places.
The route leaves Santader and works up into the volcanic country, then drops into shaded beech woods where the surface and the light change. Expect sustained climbs rather than short punchy ones, and descents that need attention on loose ground.
Among the Ride Santader gravel options, this is the hardest. The Riverside gravel intro near Santader is a gentle first taste of unpaved riding, and the Forest Gravel Loop east of Santader (72 km) is the middle step. The volcano day is for riders who already handle long off-road days and want the most demanding landscape on the site.