The road to your own record
Picture the course in advance
and find the pace that fits you.

The city you want to run becomes your next trip.




THE DREAM
This half marathon takes place beside Lake Suwa in Suwa, Nagano Prefecture.
The 38th edition will be held on October 25, 2026.
It is hosted by the Suwa Regional Health Promotion Council and operated by the Lake Suwa Marathon Organising Committee,
with entries limited to 7,000 on a first-come, first-served basis.
Picture the course in advance
and find the pace that fits you.
Streets lined with cheers, runners all around.
You'll be part of that scene.
Take it slow with the finish still in you,
and meet the city all over again.
From the joy of finishing to the tough moments — read what runners wrote themselves.
“This time, my mother and friends from my hometown cheered me on from the roadside.”
Still nursing heel pain from a 100-mile race, the runner chose to build the pace gradually rather than chase a time. Cheered on by family and friends on the rainy, familiar Lake Suwa course, they finished in 1:32:39.
Quoted from the original · translated
今回は、母親と地元の友人が路上で応援してくれた。
Read the original on note“I was anxious, but somehow I finished!”
They were worried because they had not been able to train sufficiently after changing jobs, but finished the race. They mentioned a slower time than the previous year, optional participant merchandise, and the crowd support.
Quoted from the original · translated
不安しかありませんでしたが、何とか完走しました~~!!
Read the original on みんカラ“I enjoyed running while taking in the scenery of Lake Suwa.”
The runner ran the Lake Suwa half marathon a clear, windless day in 2 hours, 6 minutes, and 51 seconds, their best time of the year. They held a steady pace of around 6 minutes per kilometer and said it was part of their build-up for next month's Mt. Fuji full marathon.
Quoted from the original · translated
諏訪湖の景色を見ながら気持ちよく走ることができました。
Read the original on noteWe translated a short line from each public race report and summarized the experience. Finish times are as stated by the author, and past editions may differ from this year's weather and operations.
Preview the course and read what runners who went before you wrote.
RUNあそぶ · Course preview
This may be from a past edition. Check the organizer for this year's course and operations.
YOUR ENTRY
Here are the ways to enter and what each requires.
Check the organizer's page for whether entries are open.
This is a first-come, first-served category of 1,500 spots reserved for Nagano Prefecture residents.
The 2026 edition took entries from June 9 to 19, applying through a dedicated entry page.
For Nagano Prefecture residents
Organizer's pageA separate postal entry is available for people who cannot use the internet.
Request the application form from the race secretariat;
only forms postmarked within the entry period are valid.
If the 200-runner cap is exceeded, a lottery is held, according to the organizers.
Dedicated application form sent by mail; no in-person submissions
Organizer's pageRegistration platform RUNNET
RACE WEEK
Know the course and time limit, and race day comes into focus.
From the 2026 edition3 hours, with cut-off point
| Event | Start |
|---|---|
| 第38回諏訪湖マラソン21.0975km | 09:00 |
¥7,700
A half marathon course around Lake Suwa in Suwa, Nagano Prefecture (諏訪市・諏訪湖).
The course is flat, with just 6.5m of elevation change, and runners keep Lake Suwa on their left.
This is not a Japan Association of Athletics Federations-certified event.
The main venue is Suwako Event Hiroba (諏訪湖イベントひろば), the former site of the Toyo Valve Suwa factory.
The start is at 9 a.m. and the time limit is three hours.
For the 38th edition,
three sections of the course were changed: the Yokokawa River mouth–Yokokawabashi detour was replaced by a straight route across Hakuchobashi on the Yokokawa River;
the finish moved from inside the yacht harbour to the area near the Nisseki Byoin-mae traffic signal in front of Suwako Event Hiroba;
and the turnaround section from the Suwa and Miyakawa river mouths to Suwa Central Park was extended slightly.
There are five cut-off point on course.
Not yet confirmed in the official race guide
This may change for the next edition.
Pick up your bib, check your wave.
So on race morning, you can just run.
This 7,000-participant race circles Lake Suwa, and bibs are mailed in advance, so there is no race-day registration.
Finish line is at Suwako Event Plaza in Suwa City. Parking is by advance first-come reservation.
Suwako Event Plaza (諏訪湖イベント広場)
Finish is in the same lakeside area as the start. Heavy congestion expected around Lake Suwa; organizers recommend carpooling or public transit over driving.
Public transit or carpooling is strongly recommended over driving. Temporary parking lots near the main venue (Suwako Event Plaza, Suwa) are allotted first-come at entry, and capacity is much smaller this year because the venue changed; runners without an allotted spot are directed to paid coin parking and akippa lots around the venue.
Your start time, fuel and bag drop.
Know them ahead and the run feels easier.
Bib, the timing chip and race information are sent together in early October;
there is no race-day registration.
Runners are assigned to blocks by self-reported expected finish time and start simultaneously.
Anyone who leaves the expected-time field blank or submits an unrealistic time starts from the final block.
Aid station will be installed at 6–7 locations on course.
If you miss the cut-off times at the five cut-off point, you must surrender your bib and,
following an official’s instructions, board the collection minibus or walk back to the finish along the pavement.
Bags may be checked only in the designated bag provided with the pre-race mailing;
other bags will not be accepted.
Runners are asked to keep changing-room use brief, and eating inside is prohibited.
Parking is allocated on a first-come, first-served basis during entry.
This year, the number of spaces is significantly lower than last year because the venue has changed.
Those who miss out on allocated parking are directed to city centre pay-and-display car parks and the paid parking-reservation site akippa.
The organisers recommend car-sharing or public transport.
Finisher certificate will be issued online to all finishers.
Times are local to Suwa. Check the latest official information before the race.
STAY A LITTLE
From a hotel that makes race morning easy,
to the meals and views you'll enjoy with the medal on.
¥28,288
View on GetYourGuide¥7,845
View on Klook¥20,205
View on GetYourGuide¥15,003
View on GetYourGuide¥20,186
View on GetYourGuide¥10,333
View on GetYourGuide¥17,175
View on GetYourGuideRest a little, wander a little.
Pick what suits you and whoever you're with.
¥28,288
View on GetYourGuide¥15,003
View on GetYourGuide¥17,175
View on GetYourGuide¥2,223
View on GetYourGuide¥15,327
View on GetYourGuide¥30,175
View on GetYourGuide¥12,424
View on Klook¥90,288
View on Klook¥3,029
View on Klook¥9,269
View on Klook¥30,973
View on GetYourGuide¥28,288
View on GetYourGuide¥22,990
View on GetYourGuide¥109,281
View on GetYourGuide¥484,053
View on GetYourGuide¥4,682
View on Klook¥20,392
View on Klook¥513
View on Klook¥25,257
View on GetYourGuideA meal before the race, a dinner to celebrate the finish.
¥7,845
View on Klook¥20,186
View on GetYourGuide¥21,972
View on Klook¥19,574
View on Klook¥9,598
View on GetYourGuide¥8,587
View on GetYourGuide¥10,103
View on GetYourGuideThe city you ran — this time, a little slower.
¥20,205
View on GetYourGuide¥10,333
View on GetYourGuide¥93,863
View on GetYourGuide¥14,925
View on GetYourGuide¥28,544
View on Klook¥23,410
View on Klook¥10,822
View on KlookOnce saved, you can open this page without an internet connection
Be the first runner
Leave this room's first post
It was held on Sun, October 25, 2026. The next race is October 2027.
Not officially announced yet.
It's expected in October 2027;
the 2026 race was held on Sun, October 25, 2026.
Not announced yet. Entries for the 2026 race opened on Wed, June 24, 2026.
Not announced yet. The 2026 race entry fee was about ¥7,700.
3 hours, with cut-off point. (From the 2026 edition)
Half. (From the 2026 edition)
The race starts at 09:00. (From the 2026 edition)
Road in front of Lake Suwa Yacht Harbor. (From the 2026 edition)
A half marathon course around Lake Suwa in Suwa, Nagano Prefecture (諏訪市・諏訪湖).
The course is flat, with just 6.5m of elevation change, and runners keep Lake Suwa on their left.
This is not a Japan Association of Athletics Federations-certified event.
Road in front of Lake Suwa Event Plaza. (From the 2026 edition)
You can compare live prices for hotels around the start in Suwa in the STAY section of this page.