
Guida
Mount Tarumae is an active volcano standing at 1,041 meters, located south of Lake Shikotsu in the southern part of central Hokkaido. Its most striking feature is its status as a rare 'triple-cone volcano.' Near the summit, you will find a scientifically significant 'lava dome,' which is designated as a natural monument of Hokkaido. The hiking trails are relatively well-maintained, and since it takes only about 50 minutes to reach the summit from the Nanagome parking lot, it is a popular destination for travelers looking to experience authentic mountain climbing in a short amount of time.
The formation of Mount Tarumae dates back to volcanic activity approximately 9,000 years ago. Its unique topography was shaped through a process of several eruptions separated by a 6,500-year dormant period. The name is believed to originate from the Ainu word 'Taromai,' meaning 'a high place by the riverbank' or 'that which is there.' This suggests the name may have originally referred to the mountain's role as a water source for the rivers below. Locally known as 'Tarumai-san,' the mountain has been deeply intertwined with the natural environment of the region for centuries.

The ultimate highlight is the panoramic view from the summit. The sight of the brilliant blue waters of Lake Shikotsu below, stretching out toward the vast Pacific Ocean, is truly overwhelming. The lava dome at the top serves as a powerful symbol of volcanic history, allowing visitors to feel the raw power of nature up close. Additionally, the trails are home to over 80 species of alpine plants, creating a colorful natural gallery that changes with the seasons.
The best time for hiking is from May to October, when the alpine plants are in full bloom. During this period, the mountain trails transform into a vibrant display of colors. Summer is particularly ideal for enjoying the combination of lush vegetation and the stunning views of Lake Shikotsu and the Pacific. However, please note that access may be restricted due to volcanic activity or weather conditions, so checking the status in advance is highly recommended.

Visitors can enjoy a rewarding hiking experience. The route from the Nanagome parking lot to the summit is suitable even for beginners or those seeking a relatively short trek. Activities include nature observation, scenic hiking, and geological exploration of the unique volcanic terrain. Please be aware that entry into the inner part of the outer rim may be restricted due to volcanic activity; please stay within the safe, designated areas.
At the foot of Mount Tarumae lies Lake Shikotsu, famous for having one of the highest water transparency levels in Japan. After your hike, exploring the Lake Shikotsu area or the surrounding natural scenic spots is highly recommended. The southern Hokkaido region, centered around Tomakomai City, offers a wonderful landscape where you can experience volcanoes, lakes, and the sea all in one trip.
To ensure a safe and pleasant climb, please prepare the following: