This study investigates the provenance of the granitic grindstones found at the Cogotas I archaeological site in Arroyo Mucientes-San Lázaro, Castronuño, Valladolid. The authors propose a general methodological flow process to determine the source of the raw materials used in these grindstones, which are often of allochthonous origin. The study combines geographic, petrographic, mineralogical, and geochemical criteria to identify the most plausible source area. Two grindstones from the excavation of a Cogotas I site in Castronuño were analyzed, with their source area inferred to be located about 50 km away in Peñausende, Zamora. The results validate the proposed methodology and suggest that the area around Peñausende could be a local source area for the grindstones. The study also discusses the potential transport routes and the socio-economic implications of the resource management practices during the Late Bronze Age.This study investigates the provenance of the granitic grindstones found at the Cogotas I archaeological site in Arroyo Mucientes-San Lázaro, Castronuño, Valladolid. The authors propose a general methodological flow process to determine the source of the raw materials used in these grindstones, which are often of allochthonous origin. The study combines geographic, petrographic, mineralogical, and geochemical criteria to identify the most plausible source area. Two grindstones from the excavation of a Cogotas I site in Castronuño were analyzed, with their source area inferred to be located about 50 km away in Peñausende, Zamora. The results validate the proposed methodology and suggest that the area around Peñausende could be a local source area for the grindstones. The study also discusses the potential transport routes and the socio-economic implications of the resource management practices during the Late Bronze Age.