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
Organized by Toda City, Saitama Prefecture, this race takes place at Saiko–Doman Green Park.
This year’s 43rd running introduces a new Relay event to commemorate the 60th anniversary of the city’s incorporation.
Participants can form teams with colleagues from work or school, or with family members.
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.
“Actually, this is my first time running at Lake Saiko.”
The runner considered dropping out of the 2018 Toda Marathon in Saiko half marathon because they felt heavy, but ran the entire second lap too. They caught other runners late, finished with a chip time of 1 hour, 20 minutes, 25 seconds, and reached the age-group podium.
Quoted from the original · translated
実は彩湖を走るのは初めてです。
Read the original on Ka_Naのブログ“I summoned my last reserves and struggled through a final sprint to finish!”
Despite being in poor condition, the writer held on through the late-race competition at the Toda Marathon in Saiko half marathon, finishing in 1 hour, 23 minutes, and 56 seconds and placing sixth in the 50s age group.
Quoted from the original · translated
最後の力を振り絞り、のたうちながらスパートし、ゴ~ル!
Read the original on RUNNING FOREVERWe 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.
todacityTV
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.
The 2026 race opened entry on Fri, July 17, 2026
We'll fill this in once the official entry rules are out.
Registration platform RUNNET
RACE WEEK
Know the course and time limit, and race day comes into focus.
ハーフ 2時間50分
| Event | Start | Time limit |
|---|---|---|
| Half21.0975km | 09:00 | 2h50m |
| 10K10km | 09:20 | 1h50m |
| 5K5km | 10:50 | — |
| Other2km | 11:40 | — |
| Other20km | 12:20 | — |
Half marathon and 10 km 5,000 yen; 5 km high school students and older and 2 km family 4,000 yen; 5 km junior high school students 2,000 yen; 2 km elementary school students 1,000 yen; relay marathon 15,000 yen.
We have not confirmed the start line coordinates yet.
Runners start · local time — (half marathon) / 9:20(10km) / 10:50(5km) / 11:40(2km) / 12:00(2km family) / 12:20(Relay marathon (approx. 20km))
Full marathon, half marathon, 10 km, and 5 km events are also held.
Start line is set up beside the Saiko–Doman Green Park Athletics Stadium, and the start time is 9:00 a.m. local time.
The finish is at the Saiko–Doman Green Park Athletics Stadium.
Pick up your bib, check your wave.
So on race morning, you can just run.
Details on registration and athlete bibs could not be confirmed in the publicly available information.
Since advance mailing or same-day collection is common for races in Japan, check the event guide (participant notification).
JR Saikyo Line / Musashino Line — Musashi-Urawa Station
Start and finish are at the same venue (the track and field stadium at Saiko-Doman Green Park), so access is the same.
Free shuttle bus service from Kitatoda Station on the JR Saikyo Line
Dedicated race shuttle buses operate (Musashi-Urawa Station West Exit ⇔ Saiko-Doman Green Park entrance, 6:00–7:15).
Your start time, fuel and bag drop.
Know them ahead and the run feels easier.
In addition to the usual marathon events, this 43rd running also features the new Relay,
created to commemorate the 60th anniversary of Toda City’s incorporation.
Registration runs from July 17 to September 17, with a separate priority-registration period for Toda City residents from July 10 to 16.
Quotas are divided by event: half marathon 1,800 runners, 10 km 1,100 runners, 5 km (high school students and older) 500 runners, 5 km (junior high school students) 100 runners, 2 km (elementary school students) 200 runners, 2 km Family 500 teams,
and Relay 100 teams.
For Entry fee, half marathon and 10 km cost ¥5,000, the 5 km costs ¥2,000–¥4,000 depending on school year, and Relay costs ¥15,000 per team of five.
Bib and timing chip are mailed in advance, with no on-the-day collection, so runners do not need to queue separately at the venue.
The completion time limit is set at half marathon 2 hours 50 minutes, 10 km 1 hour 50 minutes, 5 km 50 minutes, 2 km 20 minutes, and Relay 2 hours 30 minutes.
As there is no dedicated parking around the venue, Saiko–Doman Green Park, congestion is expected;
shuttle buses from JR Saikyo Line’s Kitatoda Station or public transport are recommended.
The race will be held as scheduled even in rain.
Times are local to Toda. 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.
Hotel · 4.4km
View on Booking.com₩152,290
View on Klook₩149,524
View on Klook₩140,208
View on KlookHotel · 4.4km
View on Booking.com₩87,098
View on Klook₩123,738
View on KlookDistances are straight-line from the start/finish area.
Check real travel times and booking terms with each hotel.
Hotel · 4.4km
View on Booking.comHotel · 4.4km
View on Booking.comHotel · 2.8km
View on Booking.comHotel · 4.1km
View on Booking.comHotel · 4.0km
View on Booking.comHotel · 4.3km
View on Booking.comAccommodation · 4.6km
View on Booking.comSwipe sideways to see more hotels.
Rest a little, wander a little.
Pick what suits you and whoever you're with.
₩152,290
View on Klook₩87,098
View on Klook₩69,785
View on Klook₩148,403
View on Klook₩69,785
View on Klook₩96,567
View on Klook₩69,785
View on Klook₩43,438
View on Klook₩134,770
View on Klook₩162,849
View on Klook₩174,020
View on Klook₩162,849
View on Klook₩173,752
View on Klook₩223,576
View on Klook₩110,673
View on Klook₩77,704
View on Klook₩99,856
View on Klook₩86,530
View on Klook₩29,433
View on Klook₩130,314
View on Klook₩122,932
View on Klook₩39,172
View on Klook₩78,167
View on Klook₩8,480
View on Klook₩14,292
View on Klook₩782,026
View on Klook₩14,292
View on Klook₩519,292
View on Klook₩7,773
View on Klook₩30,045
View on Klook₩22,084
View on Klook₩162,849
View on Klook₩12,980
View on Klook₩137,963
View on Klook₩19,964
View on Klook₩57,499
View on Klook₩38,678
View on Klook₩86,404
View on Klook₩60,875
View on Klook₩91,225
View on Klook₩113,457
View on Klook₩81,520
View on Klook₩230,170
View on Klook₩57,283
View on Klook₩187,770
View on Klook₩95,529
View on Klook₩34,439
View on Klook₩20,767
View on Klook₩8,653
View on Klook₩69,570
View on Klook₩106,778
View on Klook₩52,339
View on GetYourGuide₩113,008
View on Klook₩54,341
View on Klook₩52,091
View on Klook₩26,132
View on KlookA meal before the race, a dinner to celebrate the finish.
₩149,524
View on Klook₩123,738
View on Klook₩123,738
View on Klook₩118,546
View on Klook₩33,574
View on Klook₩51,808
View on Klook₩245,226
View on KlookThe city you ran — this time, a little slower.
₩140,208
View on Klook₩35,650
View on Klook₩108,509
View on Klook₩34,785
View on Klook₩84,799
View on Klook₩69,570
View on Klook₩271,557
View on KlookOnce saved, you can open this page without an internet connection
Be the first runner
Leave this room's first post
It takes place on Sun, December 13, 2026 in Toda, Japan.
ハーフ 2時間50分.
Marathon · Half · 10K · 5K.
Reception hours: None (Number card sent in advance).
彩湖・道満グリーンパーク, 戸田市.
Saiko/Doman Green Park Athletics Stadium.
Registration runs from Fri, July 17, 2026 to Mon, September 28, 2026.