The International Waterbike Regatta (IWR) has been organised since 1980 and with several hundred participants it is probably the largest student water sporting event in Europe. Student teams from all over Europe meet once a year at a different venue to compete in various disciplines with the pedal boats (waterbikes) they built themselves. These boats are by no means comparable to the pedal boats we see on lakes or at sea; they are structures trimmed for efficiency or fancy design. Most of the participants have a background in marine engineering or shipbuilding, so they applied the knowledge acquired in their studies to the design and construction of the waterbikes. The regatta disciplines include acceleration races, long-distance races, measuring bollard pull, and forward-stop-backward. There are not many rules, however, the important thing is that the waterbikes are built by students, they are powered by the leg muscles, and you should have fun at the event. 

IWR 2025 is going to take place in Zagreb, Croatia, from 28/05/2025 till 01/06/2025.

We expect about 300 student participants from all over Europe and over a hundred guests on every event day. 

In 2018, IWR was also organized by the Croatian Association of Naval Architecture Students (HUSB). Here you can see a video of this event.

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IMPORTANT DATES

• March 15, 2025 – Deadline for team registrations
• April 1, 2025 – Deadline for participation fee payments
• March 15, 2025 – April 15, 2025 – Application period for innovation awards
• April 15, 2025 – Deadline for team and waterbike information updates

TIMETABLE IWR2025

Wednesday 28.05.2025 
1000 – 1600 Arrival of participants and setting up the boats on the water 
1800 – 2000 Dinner and Opening Ceremony 
Party Time 

Thursday 29.05.2025 
0700 – 0900 Breakfast 
0900 – 1100 FSB Qualification 
1100 – 1300 100m Sprint Qualification 
1300 – 1400 Lunch 
1400 – 1700 Long Distance Race 
1800 – 2000 Dinner 
Party Time 
Parallel to the races: Acceleration Bollard Pull 

Friday 30.05.2025 
0700 – 0900 Breakfast 
0900 – 1100 Slalom Qualification 
1100 – 1300 FSB and 100m Sprint Rerace 
1300 – 1400 Lunch 
1400 – 1530 FSB Finals 
1530 – 1700 100m Sprint Finals 
1800 – 2000 Dinner 
Party Time 
Parallel to the races: Acceleration Bollard Pull 

Saturday 31.05.2025 
0700 – 0900 Breakfast 
0900 – 1100 Salom Rerace 
1100 – 1300 Slalom Finals 
Parallel to the races: Acceleration Bollard Pull 
1300 – 1400 Lunch 
1400 – 1530 Secret Mission 
1800 – 2000 Dinner and Award Ceremony 
Party Time 

Sunday 01.06.2025 
0700 – 0900 Breakfast 
0900 – 1200 Departures 

**The timetable is provisional and we reserve the right to adjust it at any time. Only the currently published schedule is valid. We cannot guarantee compliance 

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HISTORY