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Crossing record · Lake Ontario

Attila Mányoki's Lake Ontario Crossing

On July 19, 2026, Attila Mányoki swam across Lake Ontario: 51.4 km in 16h 33m, as read from the swim's GPS tracker.

Watch the replay → How WatchMyUltra works
Swimmer
Attila Mányoki
Water
Lake Ontario
Date
July 19, 2026
Distance tracked
51.4 km
Total time
16h 33m
Planned route
Niagara-on-the-Lake → Marilyn Bell Park
Came ashore at
Vicki Keith Point, Leslie Spit

Timed from the first moving position on the tracker to the tracker's closest approach to the landing. Distance is measured position to position along the track, so it includes currents and drift.

Attila Mányoki

The route

The tracked route of Attila Mányoki's crossing The orange line joins the tracker's positions from the start to the finish; the dashed line is the planned route. The white dot is the start and the orange dot the finish. The bar is 20 km. 20 km
Orange: the tracked route, position to position. Dashed: the planned line. White dot: start · orange dot: finish. The replay shows it on the lake, hour by hour.

The water during the swim

coldest waterat 6 AM · NOAA model
20.6 °C
strongest gustsover the route · Open-Meteo
22 km/h
swum in darknessbetween sunset and sunrise
9h 03m
of water beneath the lineNOAA bathymetry along the planned route
131 m

Water, wave and wind figures come from public forecast models captured during the swim, not from instruments in the water; depth is along the planned line, from NOAA bathymetry.

The swim and its crew

WatchMyUltra built this page around a tracker link the swim had already made public. We were not part of the crew, and nothing here came from them.

Boat captain
David Losinski

How these numbers were made

Nothing here is official. Every time, distance and speed on this site is worked out from the swimmer's GPS tracker (a device on a boat reporting every few minutes), and the conditions come from public forecast models, not from instruments in the water. The crew's log is the swim's own record, and a sanctioning body such as Solo Swims of Ontario is what makes a crossing official. Where a crew has given us a start or finish time we use theirs and say so; everything else is our best reading of the dots. A crossing becomes official only when Solo Swims Ontario ratifies it.

More crossings

All completed crossings