The San Juan River is one of the main river system in Metro Manila, Philippines, and is a major tributary of the Pasig River. It begins near La Mesa Dam as the San Francisco River, which officially takes on the name San Juan River when it meets with Mariblo Creek in Quezon City. As the San Juan River, it passes through Quezon City, San Juan City, the District of Sta Mesa, Manila, and Mandaluyong City.

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