The Grey River is a significant waterway located on the West Coast of New Zealand's South Island. It flows for approximately 200 kilometers, originating from the Southern Alps and emptying into the Tasman Sea. The river is known for its unique grey color, which is caused by the sediment and glacial meltwater that flows into it. The Grey River is an important resource for the surrounding communities, providing water for agriculture and supporting local ecosystems. It also plays a role in recreational activities such as fishing and kayaking. The river's basin is home to various wildlife, including native birds and fish species, contributing to the region's biodiversity.