Climbing Mount Fuji typically takes between 5 to 10 hours depending on the trail chosen. Most climbers start from the Subaru Line 5th station and take about 5-6 hours to reach the summit on average. Some trails like the Yoshida Trail, which is the most popular, have an ascent time up to 6 hours, while the longest ascent on the Gotemba Trail can take up to 7.5-10 hours. Many climbers prefer spreading the climb over two days to enjoy it at a more relaxed pace and to avoid altitude sickness. The descent usually takes between 3 to 5 hours depending on the trail and can be quite challenging due to loose rocks and steep slopes.