Lake Dumbleyung is a large, shallow lake located in the southwestern region of Western Australia. It covers an area of approximately 20 square kilometers and is known for its unique shape and scenic beauty. The lake is a significant habitat for various bird species, making it a popular spot for birdwatching. The lake is also historically notable as the site where Donald Campbell set the world water speed record in 1964. Today, it serves as a recreational area for activities such as fishing, kayaking, and picnicking, attracting both locals and tourists alike.