The park has many famous peaks that are numbered amongst the 100 Famous Mountains in Japan. Mt. Tanigawa, with its towering rock slopes, and the volcanoes of Mt. Asama and Mt. Kusatsu-Shiran form a richly various mountain landscape. From the sides to the foot of the mountains spread cool highlands, and there are also numerous lakes and marshes. Another huge attraction of the park is the many hot springs that have been created through volcanic activity.
Joshin’etsukogen National Park, like all of Japan's national parks, has no entrance fees, no opening and closing hours, and a permit is not required to enter or stay in the park. The national parks of Japan differ from national parks worldwide in that the land within the national parks is not exclusively designated for national park use and is made up of private property as well as public and protected areas. Visitors are free to enter and leave at any time.
The park comprises high mountains with altitudes around 2,000 m, the highest of which is Mt. Asama. The bases of these mountains form highlands. The park is also home to the famous snow monkeys that enjoy the steaming baths of Jigokudani.
In this park, it is possible to see various plants that are peculiar to mountains and highlands. In particular, the alpine floras growing in subalpine belt, flowers blooming in wetland areas, and Japanese azalea growing on the Yunomaru Highland. These plants are the reason many people visit the park.
The Mt. Naeba area is world famous for its heavy snow. The foot of the mountain is covered with expansive Japanese beech forests, while the broad marshes covering the peak of Mt. Naeba are dotted with countless ponds and are surrounded by a multitude of blooming flowers.
A pond surrounded by the high moor at the top of Mt. Yakebitai in the Shiga Highland. A variety of flowers bloom around the moor depending on the season. Frogs and salamanders are also found here. Primordial forests of Maries' fir and Tsuga diversifolia remain around the moor.
The Jigokudani hot springs in Yamanouchi Town in Nagano Prefecture are noted for their wild macaque monkeys. Active throughout most of the year, the monkeys are known worldwide as 'snow monkeys' for bathing in the hot springs during the winter; the sight is enjoyed by large numbers of tourists.
With its concentration of volcanoes, the park has an abundance of naturally rich water. The area is dotted with ancient hot spring districts: Shima Onsen, Kusatsu Onsen, Manza Onsesn, Kazawa Onsen and Yamada Onsen. These have been frequented by numerous famous writers and artists over their long history.