The Kaiapoi River is located in the South Island of New Zealand, flowing through the town of Kaiapoi before emptying into the Waimakariri River. It is approximately 20 kilometers long and plays a significant role in the local ecosystem, providing habitat for various bird species and aquatic life. The river is popular for recreational activities such as fishing, kayaking, and walking along its banks. Its scenic surroundings make it a favored spot for both locals and visitors, contributing to the area's natural beauty and outdoor lifestyle.