Head of the River Race only open to men's eights and is considered to be the peak of the head race season — attracting the top UK crews as well as foreign clubs. Composite crews, drawn from more than one club or institution, are not permitted. The Championship Course is that of the Oxford and Cambridge Boat Race but, unlike the Boat Race, the Head of the River Race is raced on an ebb tide from Mortlake to Putney. The starting time for the race is different every year and depends on the tide — the first crew (winner from the previous year) starts the
The Boat Race 1864 of Putney Bridge in order to reduce interruptions to the race from steamers. Indeed, both boat club presidents had issued a caution to the steamer captains, indicating that the race would be conducted on the ebb tide should any interruption take place which would risk the steamers becoming grounded at Mortlake. The finish was moved the corresponding distance upstream to maintain the traditional length of the race. Oxford rowed in the same boat as the previous race, which was constructed by J. and S. Salter while Cambridge utilised a new vessel built for them by Taylor of Newcastle. Oxford were