My marathons

ちばアクアラインマラソン (Chiba Aqualine Marathon)

09:459:45 AM Chiba
Tokyo Bay Aqua-Line
Tokyo Bay Aqua-Line. Photograph by aotaro, CC BY 2.0 via Wikimedia Commons

The course

The 2026 marathon starts at Shiohama Park in Kisarazu, passes Kisarazu Kaneda IC, Umi-Hotaru, Mitsui Outlet Park Kisarazu, Sodegaura City Hall and Sodegaura Park, and finishes at the former Kisarazu City Hall.

The course in short 3 lines
  • From Kisarazu over the Aqualine to Sodegaura and backShiohama Park to the old Kisarazu City Hall, with Umi-Hotaru and Sodegaura on the way.
  • If the wind closes the bridgeA wind-shortened course exists: 31.4 km for the marathon, 10.3 km for the half.
  • Closing at 16:00, 6 hours 15 minutes after the gunMarathon closes at 16:00 (6:15), half at 13:10, with gates along the way.
Course notes 3 short reads on the course
km 0 to 42.2GeometryFrom Kisarazu over the Aqualine to Sodegaura and backShiohama Park to the old Kisarazu City Hall, with Umi-Hotaru and Sodegaura on the way.

The organiser lists the marathon’s checkpoints in order for 2026: Kisarazu Kaneda IC, the Umi-Hotaru service area on the Tokyo Bay Aqua-Line, Mitsui Outlet Park Kisarazu, Sodegaura City Hall, Sodegaura Park, Hotarueno and Kiyomidai. The half marathon shares the first three and finishes at Ushigome coast instead. The organiser notes that the 2026 route changes part of the 2024 course.

Sourced

km 0 to 42.2ConditionsIf the wind closes the bridgeA wind-shortened course exists: 31.4 km for the marathon, 10.3 km for the half.

The rules say that where the committee judges the bridge section of the Tokyo Bay Aqua-Line unrunnable, every distance is run on a shortened course. The course map gives the marathon as a 31.4 km challenge run and the half marathon and wheelchair half marathon as a 10.3 km challenge run, with starts moved to 10:20 and 10:25.

Sourced

km 0 to 42.2TacticsClosing at 16:00, 6 hours 15 minutes after the gunMarathon closes at 16:00 (6:15), half at 13:10, with gates along the way.

The 2026 rules list competition end times of 16:00 for the marathon, 13:10 for the half marathon and 10:55 for the wheelchair half marathon, against wave starts from 9:40. Gates, first aid and water stations are set up on the course for safety, as the rules put it.

Sourced

Race fuel

Energy gel
An energy gel sachet
Illustration · drag to turn

5 gels for Chiba, plus 1 spare

Finish

One every 40 minutes, by the clock:

  1. km 7mile 4.4
  2. km 14.1mile 8.7
  3. km 21.1mile 13.1
  4. km 28.1mile 17.5
  5. km 35.2mile 21.8

Our pick: SiS BETA Fuel gel, box of 6, strawberry and lime. 40 g of carbohydrate a gel, about twice a usual gel, from two kinds of sugar your body takes up side by side.

Easy to forget on race morning: pack them with your bib the night before.

Only the gel you trained with. Nothing new on race day.

Get it on Amazon

We earn a small fee if you buy through these links. The price is the same.

In Canada the button opens GU Energy Gel, Salted Caramel, 24-pack, the best seller there.

Outside the Netherlands, Belgium, Germany, Austria and Switzerland, the UK and Ireland, Spain and Portugal, Italy, the rest of the EU and Canada the button opens GU Energy Gel, Chocolate Outrage, 24-pack on Amazon.com, the best seller there.

Anti-chafe
Compeed Anti-blister stick
Photo: Compeed

Compeed

Compeed anti-blister stick, 8 ml

Best selling on Amazon amazon.nl, read 2 Nov

An invisible layer before the start keeps seams, straps and shoes from rubbing skin raw.

Put it on before you leave for the start: heels and toes, inner thighs, under a bra or heart-rate strap.

Try it on a long run first, like everything you use on race day.

Get it on Amazon

We earn a small fee if you buy through these links. The price is the same.

Number belt
A race number belt
Illustration · drag to turn

Compressport Race Belt

Holds your bib without safety pins through your top, with loops for up to 8 gels.

Clip the bib on the night before, so it goes on with your shorts in the morning.

Keep the number on the front, where officials and photographers can see it.

Get it on Amazon

We earn a small fee if you buy through these links. The price is the same.

Electrolytes
A tube of electrolyte tablets
Illustration · drag to turn

SiS Hydro electrolyte tablets, tube of 20

One tablet in a bottle puts back some of the salt you sweat out.

One tablet in 500 ml of water in the hour before the start.

Only if you have used them in training: nothing new on race day.

Get it on Amazon

We earn a small fee if you buy through these links. The price is the same.

Blister plasters
Compeed Blister plasters, medium, 6
Photo: Compeed

Compeed

Compeed blister plasters, medium, 6

Best selling on Amazon amazon.nl, read 2 Nov

One in a pocket cushions a blister if one starts.

Put it on clean, dry skin and leave it until it comes off by itself.

Give a couple to whoever comes to cheer, so they are there at the km you need them.

Get it on Amazon

We earn a small fee if you buy through these links. The price is the same.
distance
42.2 km26.2 mi

Race week

Timetable

Sunday 8 November Race day

  1. 09:409:40 AM

    Wheelchair half marathon start Shiohama Park, Kisarazu. Wave start.

  2. 09:459:45 AM

    Marathon and half marathon start Shiohama Park, Kisarazu. Wave start, from 9:45.

  3. 10:5510:55 AM

    Wheelchair half marathon closes Competition ends at 10:55.

  4. 13:101:10 PM

    Half marathon closes Ushigome coast finish. Competition ends at 13:10.

  5. 16:004:00 PM

    Marathon closes Former Kisarazu City Hall finish. Competition ends at 16:00, 6 hours 15 minutes after the 9:45 start.

Times as published by the organiser, in Chiba time, checked .

Add to calendar .ics file, times in Chiba time

Trip

Getting a place

Entry through the organiser

Entry details on the organiser’s site →

The organiser, a third party. We take no entries and have no part in the race.

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