In 1540, Hernando de Alarcón and his fleet reached the mouth of the Colorado River, intending to provide additional supplies to Coronado's expedition. Alarcón may have sailed the Colorado as far upstream as the present-day California–Arizona border. However, Coronado never reached the Gulf of California, and Alarcón eventually gave up and left. Melchior Díaz reached the delta in the same year, intending to establish contact with Alarcón, but the latter was already gone by the time of Díaz's arrival. Díaz named the Colorado River "Río del Tizón", while the name "Colorado" ("Red River") was first applied to a tributary of the Gila River.