The Lierelva River is a river located in Norway, flowing through the municipality of Lier. It is known for its scenic beauty and is a popular spot for outdoor activities such as fishing and hiking. The river contributes to the local ecosystem and supports various wildlife species. The river originates from the Lier Valley and eventually merges with the Drammenselva River. Its waters are characterized by clear streams and lush surroundings, making it an attractive destination for nature enthusiasts. The Lierelva River plays a significant role in the region's natural landscape and recreational opportunities.