The Santander Half Marathon is an annual half marathon held in Santander, the capital of Cantabria, on the north coast of Spain. Complementary 10K and 5K races are held concurrently. All three races start and finish on Paseo de Pereda, the city's promenade along the Bay of Santander. The course follows the waterfront, passing through Calvo Sotelo and Jesús de Monasterio, where runners make a 180-degree turn. The route continues along Castelar, Gamazo, and Avenida Severiano Ballesteros.