Onuma Park is a representative spot for viewing autumn leaves in the southern Hokkaido region, and visitors are especially captivated by the autumn scenery that colors the lakeside. The park is protected as a quasi-national park, and the autumn leaves reflected on the lake surface and the majestic figure of Mt. Komagatake create a spectacular view. There are three lakes, Lake Onuma, Lake Konuma, and Junsai Numa, and the maples, Japanese maples, beeches, and oaks that grow around the lakeside turn vibrant red, yellow, and orange during the autumn season. This color palette created by nature will be an unforgettable memory for visitors. Walking along the lakeside trail, you can feel like you are passing through a tunnel of autumn leaves, and you can enjoy the beautiful scenery reflected on the lake surface through the trees. The autumn leaves of Onuma Park are also beautiful when they shine in the sunlight during the day, but the scenery wrapped in soft light in the early morning and evening is also recommended. The early morning fog creates a fantastic atmosphere and is especially great for photography. The best time to see the autumn leaves is from mid- to late October, when many tourists visit from all over the country, but if you want to avoid the crowds, the best time to go is on a weekday morning.