The best season for spring mountain climbing on Mt. Rausu is from the end of April to around June, when the snow melts. This is a beautiful season where the mountain surface still retains traces of winter and the newly sprouted spring plants coexist, providing a special experience for climbers. Because of the high altitude, the seasons change slower than in the lowlands, so you can enjoy the breath of spring for a longer period of time. There are routes that can be enjoyed by beginners to intermediate climbers, and the standard course time is about 6 to 8 hours. There are many points that photography enthusiasts cannot miss along the way, such as streams flowing with meltwater and forests with beautiful new greenery. On the mountain trail, you can feel the refreshing wind unique to spring, and the chirping of birds will soothe your ears, allowing you to enjoy nature with all your senses. However, caution is required when climbing in the spring. It is also a time when the temperature is unstable, and mornings and evenings can drop below freezing. It is essential to take sufficient cold weather measures and anti-slip equipment such as crampons for mountain climbing. Also, be careful of brown bears, so we recommend carrying bear bells and spray. Be sure to check the weather and trail conditions in advance and be fully prepared before heading out.