The name Jigokudani, meaning "Hell's Valley", is due to the steam and boiling water that bubbles out of small crevices in the frozen ground, surrounded by steep cliffs and formidably cold and hostile forests.

[3] The heavy snowfalls (snow covers the ground for four months a year), an elevation of 850 m (2,800 ft), and being only accessible via a narrow 2 km (1.2 mi) footpath through the forest, keeps it uncrowded despite the park being relatively well known.

It is famous for its large population of wild Japanese macaques (Macaca fuscata), more commonly referred to as snow monkeys, that go to the valley during the winter, foraging elsewhere in the national park during the warmer months.

However, since the monkeys are fed by park attendants, they are in the area of the hot springs all the year round, and a visit at any season will enable the visitor to observe hundreds of the macaques.

The Shimokita Peninsula is at the northern part of the Honshū island and the northwest area of this peninsula, latitude +41°31' longitude +140°56', approximately 500 km (310 mi) north from Jigokudani is the northern limit of Japanese macaque habitat.