Circumferential Road 1 (C-1), informally known as the C-1 Road, is a network of roads and bridges that all together form the first and innermost beltway of Metro Manila in the Philippines. Spanning some 5.98 kilometers (3.72 mi), it connects the districts of Ermita, Intramuros, San Miguel, Quiapo, Sampaloc, Santa Cruz, Binondo, San Nicolas, and Tondo in Manila.