San Silvestre de Llanera is a 5 km New Year's Eve run held in Posada de Llanera, Asturias, Spain, starting in the early evening instead of the morning. It is designated as non-competitive, emphasizing a shared run to conclude the year over striving for official rankings or prizes.
The event is organized by Llanera's town council and Club Llanera Atletismo, marking its thirty-second edition. While exact route details are limited, the format is established: a short local 5k in Posada, scheduled for the final afternoon of the year, following the Spanish San Silvestre tradition of ending the calendar with a run.