Aquarun Coslada 2026: date, schedule and distances

Plan your race pace

The third edition of Aquarun Coslada will take place on Saturday, September 12, 2026, at El Cerro Summer Pool in Coslada, Madrid. The event will start at 10 a.m. and will once again combine swimming and running in an aquathlon format designed for different age groups, from benjamins and alevins to senior and veteran participants.

The competition will feature individual and two-person relay categories. In the main events, each athlete will complete a running leg, a pool swim and a second running leg, while relays will allow two people to divide the sections between them. Registration is scheduled to run from July 8 to September 9, 2026, with limited places and different fees depending on the category and membership status.

The available information can be checked alongside the popular race calendar and the race map, two useful resources for placing the event within the national schedule. The event is organized by Unión Atlética Coslada, with support from the Sports Department of Coslada City Council.

A competition combining a pool and an urban course

The Aquarun format differs from the usual popular race structure. It is not only about covering kilometers on asphalt or swimming several lengths in a pool: the challenge is to link different efforts, change sporting movements and stay focused during transitions. This combination makes the event close to triathlon, although with distances and organization that are more accessible.

The planned sequence for youth, senior, veteran and relay categories is 2.1 kilometers of running, 600 meters of swimming and another 2.1 kilometers of running. In practical terms, the running sections total 4.2 kilometers and the event approaches a total distance of 4.8 kilometers, excluding transition time. The combined 5K label is useful for orientation, but it does not describe a conventional five-kilometer race.

The setting also shapes the experience. El Cerro Summer Pool contains the swimming section and transition areas, while the running leg takes place on a course prepared by the organizers around Coslada. Moving from a wet surface to a dry one requires attention: shoes, pace and equipment placement cease to be minor details when every minute matters.

Date, venue and start time

The event is set for September 12, 2026, a Saturday, starting at 10 a.m. The start will be based at El Cerro Summer Pool, on Moscow Street in Coslada. The event takes place during a still-warm period in the Madrid region, so temperature, sun exposure and hydration will be relevant, particularly during the running section.

The morning start usually means cooler conditions than those found around midday. Even so, participants should assess the actual conditions on race day and should not treat the schedule as a guarantee of cool weather. In an event alternating swimming and running, the body can send misleading signals: the pool cools the skin, but accumulated effort returns as soon as the athlete leaves the water.

Registration is scheduled from July 8 to September 9, 2026, until 11:59 p.m. according to the calendars consulted. Administrative closure does not necessarily mean that places will remain available until that date, because the event announces a limited capacity. Final fees and conditions should be checked through the official channel before registering.

Distances adapted to each category

The main difference between age groups is course length. Youth, senior, veteran and relay participants will complete 2.1 kilometers of running, 600 meters of swimming and another 2.1 kilometers on foot. Swimming laps will be monitored with the support of volunteers, who will provide identification bands to help track progress.

According to the information published for the announced edition, children and cadets will also follow the 2.1-kilometer run, 600-meter swim and 2.1-kilometer run format. For alevins and benjamins, the course is considerably shorter: 383 meters of running, 200 meters of swimming and another 383 meters on foot. This adaptation reduces the overall load while preserving the essential character of the aquathlon.

Results are organized by age category, with separate male and female classifications. The groups include benjamin, alevin, child, cadet, youth, senior and veteran, although the exact birth-year ranges and any regulatory changes should be checked in the official documents. Categories are not merely administrative: they determine distance, competition format and eligibility for awards.

How the two-person relays work

The relay category is designed for two people. One person completes the running sections and the other handles the swimming leg, allowing the team to divide the effort according to individual strengths. This format may appeal to people who enjoy a competitive atmosphere but do not want to complete all three sections themselves.

The handover takes place in the transition area, where the swimmer passes the relay to the runner. The bib and identification elements must be used exactly as provided by the organizers, without alterations that could complicate control. Coordination is as important as fitness: arriving late, using the wrong space or failing to identify the area can turn a simple handover into lost time.

The relay format also strengthens the social side of the event. It can bring together relatives, friends or training partners with different abilities. However, sharing an entry does not remove individual obligations: both athletes must know the regulations, follow staff instructions and meet the relevant age or authorization requirements.

Pool swimming and transitions

The swimming section takes place in a pool, a more controlled setting than an open-water event. There are no waves or navigation problems, but other challenges appear: maintaining direction within the lane, overtaking without interference and keeping a sustainable pace when breathing changes after the opening run. The 600-meter distance gives technique an important role, even among recreational athletes.

The official swimming cap will be mandatory and must be visible during the swim. Regulations also cover the use of a swimsuit or trisuit and prohibit wetsuits for all ages. This condition distinguishes the event from some open-water aquathlons and prevents additional buoyancy from changing the competitive conditions.

The pool provides support points for participants who need to stop, provided they follow the event rules. Athletes may stop where they can stand or beside the lane ropes and buoys, but may not use them to move forward. In an emergency, they must request assistance and withdraw once treated. The presence of lifeguards and medical staff strengthens safety, but does not replace the duty to act prudently.

Required equipment and race-day planning

Basic equipment includes the official bib, swimming cap, sports shoes and clothing suitable for both disciplines. The bib must remain clearly visible on the front during the run. Footwear deserves attention: shoes offering good support and reasonable drainage may provide more security than an extremely light but unstable model when leaving the water.

According to information from the first edition, the participant bag includes a bag, bib, numbered cap, event shirt and refreshments. The exact contents of the 2026 kit may change, so no item should be taken for granted unless it appears in the final announcement. Athletes should arrive with their equipment checked and avoid wearing new clothes or shoes on race day.

The organizers ask participants to arrive with enough time to collect their bib, locate the transition area and hear the instructions. In an event of this kind, knowing the course beforehand has enormous practical value. The transition works like a small room with narrow doors: every object must be in place and every movement should follow a simple routine.

Safety, hydration and participation rules

The safety plan includes lifeguards at the pool, medical staff along the course and accident insurance. Water will also be available at the refreshment point and finish. These measures support the response to incidents, but prevention begins before the start: hydrate normally, sleep well and do not compete with fever, dizziness, chest pain or symptoms that could worsen during exertion.

Minors need permission from their parents or legal guardians. This requirement makes sense in a competition that combines running, swimming and transitions, because the risk is not concentrated in a single movement. Fatigue can appear after leaving the water, when breathing has not yet settled and the body must once again absorb repeated impact.

Instructions from support staff must be followed at all times. The bib cannot be altered, the marked space for each participant must be used exclusively and transition zones are not places for improvisation. The regulations are the event’s compass: they establish boundaries that allow people of very different ages and abilities to compete at the same time.

Awards and sporting atmosphere in Coslada

The event has a competitive side, but it also aims to promote family participation and community spirit. The first edition included trophies for the top three in the absolute category, medals for the top three in each age group and awards for the first three male, female and mixed relay pairs. The 2026 awards system should be checked in the updated regulations.

This balance between classification and an open atmosphere explains much of the event’s appeal. Athletes with sporting ambitions find a race with times, categories and transitions; first-time participants can discover a different discipline in a familiar venue. Aquathlon has the feel of a small stage change: the sound of shoes gives way to splashing, and then the steady rhythm of running returns.

The presence of children’s and youth groups also gives the event an educational dimension. The goal is not only to run faster or swim farther, but to learn how to move between disciplines, look after equipment and respect shared rules. In this sense, Coslada connects popular athletics with triathlon culture.

What to check before registering

Registration should be completed according to the correct category, selected format and applicable fee. The sources consulted indicate different prices and a discount for members, but they do not provide one confirmed amount for 2026. Publishing a fixed figure without current support could mislead readers, especially when fees may vary according to date or age group.

It is also important to verify information about bib collection times, parental authorization, lane allocation, classification systems and possible course changes. A race announcement is not frozen: organizers may adjust logistical details in response to the number of entries, pool requirements or safety conditions.

The Unión Atlética Coslada website is associated with the domain unionatleticacoslada.com, which should be used as the reference for edition updates. External calendars help locate the event and understand its general features, but binding information about registration, rules and schedules will always be the information published by the organizers.

A short but technically demanding challenge

The Aquarun distances may seem modest compared with a road triathlon, although reducing the kilometers does not remove the challenge. Running before swimming raises breathing rate; swimming afterward requires technique under fatigue; running again with a wet body changes sensations and foot strike. The difficulty comes from the sequence of changes, not only from the total volume.

General preparation should include familiarity with all three phases and, above all, with transitions. It is not enough to feel comfortable in the water or complete the running distance without difficulty. The body needs to recognize changes in rhythm and support, just as a gearbox must shift smoothly when the terrain changes.

Pacing will be decisive. A start that is too fast can create an oxygen debt that is difficult to correct during the swim, while saving too much energy can leave unused capacity for the second running leg. The best strategy will depend on experience, category and individual condition, with safety always taking priority over the stopwatch.

Coslada prepares a different kind of running event

On September 12, 2026, El Cerro Summer Pool will again host a competition combining water, running and local community life. The third edition maintains the structure that defines the event: age-adjusted courses, two-person relays, pool monitoring and a running circuit integrated into the urban surroundings of Coslada.

The event is interesting both for people seeking their first aquathlon experience and for athletes used to combining disciplines. Its distances do not require the duration of a conventional triathlon, but they do demand order, attention and a well-executed transition. That combination gives the event its identity: a race that cannot be understood by looking only at the asphalt or only at the water.

With registration planned through September 9 and the start scheduled for 10 a.m., the main information is defined, although operational details should be confirmed in the organizers’ regulations. Aquarun Coslada is therefore a compact event with an inclusive outlook, capable of turning a sporting morning into a short sequence of linked challenges.