Marcelino Garcia Alonso (born 1971 in Oviedo, Asturias) is a Spanish former professional road cyclist. He rode for the Danish professional cycling team, CSC–Tiscali, which he joined coming from Spanish Team ONCE. He rode for the Danish team until 2002, where he went to another Spanish team, Labarca 2–Cafés Baqué. Since retiring, he works as a Tour Guide during the Grand Tours in the summer months throughout Europe.