River Lostock is a small river located in Greater Manchester, England. It flows through the towns of Bolton and Blackburn, eventually joining the River Darwen. The river is approximately 10 miles long and is part of the River Mersey catchment area. The River Lostock is known for its natural beauty and diverse wildlife. It provides a habitat for various species of fish and birds, making it a popular spot for nature enthusiasts. The surrounding areas offer walking paths and recreational opportunities for residents and visitors alike.