The Lier River is a small waterway located in Norway, flowing through the municipality of Lier in Viken county. It is known for its scenic beauty and is a popular spot for outdoor activities such as fishing and kayaking. The river eventually joins the larger Drammenselva river, contributing to the region's rich aquatic ecosystem. The Lier River is approximately 20 kilometers long and plays a vital role in the local environment. It supports various wildlife and plant species, making it an important natural resource for the surrounding communities. The river's banks are often lined with walking trails, providing residents and visitors with opportunities to enjoy nature.