Preparation guide · TradeINN Zarauzko Triatloia (middle distance)

Zarautz Triathlon 2027: how to prepare it and what to eat and drink

The next edition is on Saturday 12 June 2027 (provisional date: the organisers haven't confirmed it yet; in 2026 it was held on 13 June. The time of each leg is indicative), starting in Getaria (Gipuzkoa, Spain) at 9:30. Here you have the three legs of the Zarauzko Triatloia: the swim, the bike with its profile and feed stations, and the run with split times, what's at each aid station, how much to eat and drink and the usual weather.

Swim (2.8 km): the swim

From Getaria to Zarautz in open sea; there are water bottles before the start and no stations during the crossing.

Swim keys

• A 2.8 km open-sea crossing from Getaria to Zarautz: no laps and no pool. Memorise the coast and the finish reference to navigate.
• There are no stations during the swim: only water bottles on Getaria beach before the start. Set off having drunk and eaten breakfast well.
• The Bay of Biscay is cool in June: check whether wetsuits are allowed and test yours beforehand. Warm up in the water for a few minutes if you're allowed.

Bike (80 km): route

Climbing from the organisers' historical 2022 file (80.45 km, +990 m); the 2026 route is described on the official website.

Official profile and track on the organisers' website.

Route keys

• 80 km and about 990 m through Gipuzkoa: a middle-distance bike with constant ups and downs. Here pace is earned by measuring, not by pushing hard at the start.
• You pass four full stations: Meagas / Loinaz farmhouse (km 1.8, 34 and 74), with water, Powerade, gels, bars and bananas, and the Zumaia roundabout (km 62), with water, sports drink, gels and bars.
• With 2.5 to 4 hours on the bike, eat carbs from the first quarter of an hour and every 20–30 minutes. Swap bottles at the station without losing your rhythm.
• In June on the Basque coast it can be sunny and hot or rainy: carry a waterproof in your pocket if the forecast warns of it and take care on wet corners.

3 more keys in WinWatts: with the forecast for the days before, the wind and heat section by section, and on which climbs to eat and drink.

Bike (80 km): what to eat and drink

How much a typical rider (72 kg) needs depending on their time. From 2–3 hours on, what matters most is eating carbs regularly (every 20–30 minutes) and drinking before you're thirsty.

More than 60–90 g of carbs per hour only if you've trained it. Don't try on race day what you haven't tolerated in training.

Feed stations

Km 1.8, 34 and 74 (Meagas / Loinaz farmhouse): water, Powerade, gels, bars and bananas; km 62 (Zumaia roundabout): water, sports drink, gels and bars.

Without the official track loaded we don't work out the section-by-section plan. In WinWatts, with your GPX, you see how much to eat and drink between each feed station at your pace on every climb.

Bike (80 km): weather in mid-June

What the weather was like on race day in recent editions (at the start area):

Run (20 km): route and profile

Three laps along the promenade, the Malecón and Kale Nagusia; stations from the official 2026 information (no GPX published). Calle Higer: bananas; Parke Ikastola: oranges.

Route keys

• 20 km in three laps along the promenade, the Malecón and Kale Nagusia: an urban circuit with lots of spectators and many turns. Start with the bike in your legs and controlled pace.
• There are seven stations, two alternating per lap (Calle Higer and Parke Ikastola, at km 0.4, 3, 6.6, 9.2, 12.8, 15.4 and 19), all with water, Coca-Cola, sports drink, gels and bars; bananas at Higer and oranges at Ikastola.
• After the bike, the stomach tolerates less: test in training which gel and how much agrees with you, and take cola only if you've tried it.
• The laps help: count how many you have left, split your effort by lap and save your best for the last one.

More keys in WinWatts: with the forecast for the days before, the wind and heat, and your split times at your pace.

Split times

At an even pace (we haven't loaded the official track yet, so climbs and descents aren't adjusted: use it as a reference), with the clock time counted from when you start running (indicative: it depends on how long you take to swim and ride). You start with the bike in your legs: begin below your clean marathon pace. Write yours down or wear them on a pace band: watch GPS usually reads long.

Aid stations: what's there and how much to drink

For a typical runner finishing in about 1 h 45: sip without stopping and take each gel just before an aid station, to wash it down with water. The organisers hand out gels at km 0.4, 3, 6.6, 9.2, 12.8, 15.4 and 19: if they match your plan, those are gels you don't need to carry.

How many gels and how much to drink

What a typical runner (68 kg) needs depending on their time, with 35 g gels. When running the stomach tolerates less than on the bike: more than 60 g of carbs per hour only if you've trained it. Gels alone don't reach that figure (the first one comes around 45 minutes and none are due in the last half hour): the rest comes from drinking sports drink instead of water at a few aid stations.

Nothing new on race day: gels, breakfast, shoes and socks, all tested on your long runs. Vaseline on your feet, groin and armpits, and protect your nipples. If it's cold at the start, wait in your corral in old clothes you can throw away.

Run (20 km): weather in mid-June

What the weather was like on race day in recent editions (at the start area):

When running, heat slows you down: allow roughly 2 % more time for every 5 ºC above 12 ºC.

WinWatts is not affiliated with the organisers of the Zarauzko Triatloia. Dates, routes, schedules and registration: official website. Distances, aid stations and course from the official 2026 triathlete information; no GPX published; weather from past editions (Open-Meteo). For guidance only: it doesn't replace advice from a health professional.