Shiretoko National Park (知床国立公園 Shiretoko-kokuritsukōen) covers the entirety of the Shiretoko Peninsula (知床半島 Shiretoko-hantō), a remote northeastern corner of the Japan island of Hokkaido. In 2005, the park was designated as a UNESCO World Heritage Site.
Shiretoko is one of the most remote areas of all Japan. The national park has no sizable settlements, and the northern portion of the peninsula does not even have any roads. Peak visiting season is during the short summer season; the park is open all year round, but the conditions in winter can be very harsh.
Public transport to Shiretoko is extremely limited. The nearest train station is at Shari, from where you can catch infrequent buses (3 per day in peak season) through Utoro to the western coast of the peninsula. On the eastern side is the small town of Rausu, reachable by bus from Kushiro (3.5 hours) and (in summer only) two daily buses from Utoro as well.
Getting around for all practical purposes requires your own set of wheels, as buses services are limited and infrequent, especially outside the peak summer season. The northern side of the peninsula is off-limits to cars of any sort. There are no roads on the southern side of the peninsula past Rausu.
There are a number of popular hikes, but most require spending a night or two on the trail. The volcanically active Mt. Iō (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.
Mt. Rausu (羅臼岳 Rausu-dake). A climb to the summit of this 1665m mountain is a tough but popular day trip. In bad weather, Mt. Rausu can be quite dangerous.
Iwaobetsu Course (岩尾別コース). This is the most popular and less-rugged course.
Rausu Onsen Course (羅臼温泉コース). Most hikers start around 05:00. This course is around 14.6 km roundtrip and, because of the large elevation gain, takes 9-12 hours. It is best to carry water from the bottom or use (properly treated) snow melt — there are some steam vents and sulfurous areas that might make the stream water undrinkable.
Iwaobetsu Onsen (岩尾別温泉). 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.
Kuma no Yu (熊の湯), 臼町湯ノ沢町 (across from the Rausu Onsen Campground, a minute NW of the Rausu Visitor Center on Highway 344; there is roadside parking next to a 20m bridge leading to the onsen), 44.031673°, 145.155616°, +81 153 87-2111. 24 hours. This is a free outdoor onsen. Women have their own bath but often come to the mixed bath too. There are no towels or soap available, so visitors should bring their own. The mixed bath is almost visible from the road, though tree branches help provide some privacy. The womens' bath has a wall for privacy. Free.
There are few places to eat in Shiretoko. The youth hostel has affordable meals and will pack a lunch on request. Sometimes there are food stalls at Shiretoko Pass.
Shiretoko's sole alcoholic entertainment option is the tongue-in-cheek Izakaya Iwaobetsu at the youth hostel, consisting of a beer vending machine.
Upscale lodging can be found in nearby Rausu and Utoro in Shari.
Shiretoko claims Japan's largest bear population, a fact stressed to no end in local tourist literature. In practice, the Hokkaido brown bear (ezo-higuma) is no match for the North American grizzly, and you are exceedingly unlikely to be attacked if you observe a modicum of common sense. That said, most hikers wear tinkling bells known as kumasuzu to alert bears (which shy away from human contact), and you should not leave any food in or near your tent if camping.
On the trail from the summit of Rausudake to Rausu, on the first major flat spot below the summit, there is a stream from which you may be tempted to drink. The water is heavily laden with sulfur and will make you very sick if you drink it. There is a spring with drinkable water a short distance off the trail. Follow the arrow on the boulder with the Kanji character for "water" 水.