Boats and crews of all shapes and sizes will set off from east London for The Great River Race on the River Thames.
Early birds armed with oars will arrive at Millwall Riverside on September 12 from 7.35am.
After some team talk and last minute prep they will make their way to Millwall Dock Slipway, where the challenge upstream on the River Thames begin for the first 300 entrants.
Those crews - all sailing on a slowest first, fastest last handicap - will first pass under Tower Bridge after sailing past Canary Wharf’s skyscrapers.
The are expected to sail under at around 11.30am, and passers by can witness the spectacle from a variety of vantage points along the route, including Kew, Putney, Chiswick and Hammersmith bridges.
Fancy watching the race winner cross the watery finish line? Then head to Riverside below Ham House, in Richmond, at around 1.45pm.
There the crews will make their last push for The Challenge Trophy of The Company of Watermen & Lightermen and strive to be crowned the UK Traditional Boat Champions.
The challenge has more than quadrupled in size since its creation in 1988.
Back then, 72 entrants chose more than 20 boat types representing six countries, including an Hawaiian outrigger war canoe.