Originating from the Himalayas in eastern Nepal, the Kosi
River—often called the “Sorrow of Bihar”—enters the state near
Supaul and flows southward before merging with the Ganges near
Kursela. Its vast braided channels and shifting course have shaped
Bihar’s landscape for centuries. Despite its reputation for
floods, the Kosi nurtures rich alluvial plains, supports
agriculture, and sustains dozens of riverside communities.
From the majestic Kosi barrage at Bhimnagar to the serene ghats of
Saharsa, the river’s journey through Bihar is a mix of natural
drama and cultural heritage.
