The first numerical age determinations from radiocarbon dating establish the chronology of glacial events in Redes Natural Park (Cantabrian Mountain, NW Spain). A core drilled in an ice-dammed deposit provided a minimum age of 28 990<space>+/-<space>230<space>years BP for the maximum glacial expansion (phase<space>I). Another core from a cirque bottom-fill provided organic sediment with 20 640<space>+/-<space>300<space>years BP, a minimum age for the first glacial retreat (phase II). Radiometric dating of proglacial deposits interpreted as synchronous with the last glacial maximum phase in neighbouring Comella basin (Picos de Europa), yield ages of 40 480<space>+/-<space>820<space>years BP. The chronological data presented in this work are consistent with the model of glacier evolution established in the Pyrenees, with a glacial maximum phase for the last glacial period older than 18<space>ka.