This wonderful 3.4 kilometer hiking course leading to Ashi Lake enables you to stroll along the Haya-kawa river and go through the Nagao Pass (a registered "geological site"). On the way, you can enjoy views of Mt. Kamiyama and Kanmuri-ga-take, and see how the Ashi Lake was created 3,000 years ago by a large landslide on Mt. Kamiyama. Near the end, you will find an area with facilities for groups such as a visitor center, flower park, and camping ground.