Major tributaries of the Upper Calder include the Walsden Water, which flows through the large village of Walsden to join the Calder at Todmorden; the Hebden Water, which flows through Hebden Dale to join the Calder at Hebden Bridge; Cragg Brook, which flows through Cragg Vale to join the Calder at Mytholmroyd, and the largest, the River Ryburn, which joins the Calder at Sowerby Bridge.
The Upper Calder is supplied by several major tributaries: the Walsden Water, which flows into the Calder near Todmorden; the Hebden Water, which joins the Calder close to Hebden Bridge; Cragg Brook, which converges with the Calder at Mytholmroyd; and the largest, the River Ryburn, which merges with the Calder at Sowerby Bridge.