My marathons

Biel running days

Biel/Bienne
Biel/Bienne
Biel/Bienne. Photograph by Scientia90, CC0 via Wikimedia Commons

The course

The 100 km is the heart of the Biel running days: a route unchanged for decades that takes runners through the night across more than 20 municipalities and 2 cantons.

The course in short 2 lines
  • The 100 km night run through two cantonsThe 100 km runs by night through more than 20 municipalities and 2 cantons.
  • Nine formats around the 100 kmHalf marathon, 10 km, relays over the 100 km and a kids run.
Course notes 2 short reads on the course
Whole courseTacticsThe 100 km night run through two cantonsThe 100 km runs by night through more than 20 municipalities and 2 cantons.

The Biel running days of 11 and 12 June 2027 end with what the organiser calls the night of nights. A bike escort is allowed only in the individual 100 km, starting in Lyss, and entries on site are possible for every format up to two hours before the start.

Sourced

Whole courseTacticsNine formats around the 100 kmHalf marathon, 10 km, relays over the 100 km and a kids run.

The organiser sells the half marathon as the one where the night turns into day and the 10 km as the fast night run. The relays split the 100 km between five or two runners.

Sourced

Race fuel

Energy gel
An energy gel sachet
Illustration · drag to turn

14 gels for Biel/Bienne, plus 1 spare

Finish

One every 40 minutes, by the clock:

Over this distance most runners mix in real food at the aid stations; the gels cover the hours between.

  1. km 6.7mile 4.1
  2. km 13.3mile 8.3
  3. km 20mile 12.4
  4. km 26.7mile 16.6
  5. km 33.3mile 20.7
  6. km 40mile 24.9
  7. km 46.7mile 29
  8. km 53.3mile 33.1
  9. km 60mile 37.3
  10. km 66.7mile 41.4
  11. km 73.3mile 45.6
  12. km 80mile 49.7
  13. km 86.7mile 53.9
  14. km 93.3mile 58

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.

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
100.0 km62.1 mi

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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