The Sundsvall River is a river located in the city of Sundsvall, Sweden. It flows through the region of Västernorrland and is known for its scenic beauty and importance to the local ecosystem. The river is approximately 100 kilometers long and plays a vital role in the area's hydrology. Historically, the Sundsvall River has been significant for the local economy, particularly in the timber industry. Its waters have been used for transporting logs and other goods, contributing to the development of Sundsvall as a key industrial center in Sweden. Today, the river is also a popular spot for recreational activities like fishing and kayaking.