Each summer, Lake Toya hosts the “Hokkaido Triathlon,” a race that combines swimming, cycling and running across three legs. Starting and finishing at Lake Toya Onsen, the course sweeps through the magnificent scenery around Mount Yotei—making it a special day for the athletes who compete and for the family and friends who come to cheer them on. In this article, Kamonoya, a whole-house rental operator here at Lake Toya, walks you through the event, the lodgings you can use as a base, and how to make the most of cheering from the sidelines.
What is the Hokkaido Triathlon?
The Hokkaido Triathlon starts and finishes at Lake Toya Onsen and unfolds across the countryside at the foot of Mount Yotei. The venue spans a wide area encircling Mount Yotei—Toyako Town, Sobetsu, Toyoura, Makkari, Rusutsu, Kimobetsu and Kyogoku. The swim takes place in Lake Toya, followed by the bike and run legs along the roads around the base of Mount Yotei.
The race is usually held in August (recently on August 18, 2024, and August 24, 2025). Its greatest draw is the quintessentially Hokkaido setting, ringed by lake and mountains.
The dates change from year to year. For the most up-to-date and accurate information on the 2026 event schedule, please check the official website (hokkaido-triathlon.jp).
Scale and entry
In recent years the field has numbered around 200 to 300 participants. Going from a swim in the lake to the bike and run legs at the mountain’s foot—experiencing both lake and mountain in a single day—is what makes the Hokkaido race so distinctive.
The distances for the swim, bike and run legs, as well as the entry fee, participant cap and registration period, vary from year to year. Because it is a popular race, it is wise to complete your registration early once the dates are announced. For full details, please check the event guidelines on the official website.
Recommended lodgings for a pre-race night and base
Triathlons typically start early in the morning, and your physical condition on the day has a major bearing on your result. Staying the night before near Lake Toya Onsen, where the race starts and finishes, lets you cut down on travel and rest properly before the race.
Every Kamonoya lodging is a whole-house, private rental. With no other guests to worry about, you can spend your time entirely at your own pace—ideal for teams or support families staying several nights.
- Kamonoya Toya House (up to 8 guests, from ¥24,000/night) — a whole-house rental in the heart of the onsen town. Close to the start and finish, it makes a convenient base for a pre-race night.
- Toya INN-East (up to 11 guests, from ¥30,000/night) — a large property in the town center. A great place for a team or support crew to gather.
- Lake Toya Base (up to 20 guests, from ¥30,000/night) — a whole-house rental for large groups. Perfect for a club or team staying the night before.
- Lake Toya Building 1R (up to 3 guests, from ¥7,000/night) — an apartment in the town center. Affordable for solo athletes or small groups.
For a pre-race night with a large team, our large-group stay guide is also worth a look. Every property has a full kitchen, so managing your meals before and after the race is easy—one of the advantages of a whole-house rental. For details on facilities, please check each property page or get in touch.
Combine cheering with sightseeing
Once you have seen the athletes off, one of the joys of the Lake Toya race is pairing your cheering with some sightseeing. The lakeshore that hosts the swim is rich in spots you can drop by while you wait—the onsen town’s hand baths and foot baths, the Silo Observatory, and the Lake Toya boat’s Nakajima cruise.
In summer, Lake Toya also holds the Long-run Fireworks Festival (typically late April to the end of October, about 20 minutes each night from around 20:45). Watching the fireworks over the lake on race night makes the memory of your trip all the more meaningful. It is reassuring to check cheering spots and the day’s traffic restrictions once the course is announced.
Booking directly through our official site is the best-value official rate, with no agency commission (best-rate guarantee). Check availability here. If you would like to browse our other properties too, see the list of facilities.
FAQ
When is the Hokkaido Triathlon held?
It is usually held in mid-to-late August (August 18 in 2024, August 24 in 2025). The date changes from year to year.
Where does the swim take place?
The swim takes place in Lake Toya. The race starts and finishes at Lake Toya Onsen and is contested across the swim, bike and run legs throughout the area at the foot of Mount Yotei. Please check the official website for the detailed course.
Can you tell me the entry fee and distance categories?
The entry fee, distance categories and participant cap change from year to year, so we do not state them definitively in this article. If you are considering entering, please be sure to check the official website (hokkaido-triathlon.jp) for the most up-to-date and accurate information.