| Race to Sestao | 937.84 mi (1,509.30 km) |
| Race to Sevilla | 1,278.11 mi (2,056.92 km) |
| Race to Sevilla La Nueva | 1,071.91 mi (1,725.07 km) |
| Race to Silla | 947.71 mi (1,525.19 km) |
| Race to Silleda | 1,200.26 mi (1,931.63 km) |
| Race to Sitges | 778.38 mi (1,252.68 km) |
| Race to Socuellamos | 1,054.65 mi (1,697.30 km) |
| Race to Soller | 799.71 mi (1,287.01 km) |
| Race to Solsona | 764.54 mi (1,230.41 km) |
| Race to Son Servera | 779.52 mi (1,254.52 km) |
| Race to Sonseca | 1,091.19 mi (1,756.10 km) |
| Race to Sopelana | 934.94 mi (1,504.65 km) |
| Race to Soria | 954.13 mi (1,535.53 km) |
| Race to Suances | 984.47 mi (1,584.36 km) |
| Race to Sueca | 950.03 mi (1,528.93 km) |
