There are a number of popular hikes, but most require spending a night or two on the trail. The volcanically active Mt. IÅ 1563m is generally off limits due to the sulphuric fumes it spews out it last erupted in 1936, but Mt. Shiretoko 1245m at the northern tip is a possibility. Kamuiwakka Falls trail head closed, but the trails are open.
Iwaobetsu Onsen
After a hard day's climbing, reward yourself with a dip in this basic but pleasant open-air hot springs. Free and mixed, so be sure you are comfortable with that.