The Heineken Roeivierkamp ('H4K') is an international rowing tournament that is held annually on the Amstel in Amsterdam in the second or third weekend of March.
The final score is determined by calculating the results back to a 250-meter time and adding to each other (comparable to the all-round classification in speed skating races).
The start of the short distances is at the Nieuwe Amstel bridge (between Ceintuurbaan and Ruyschstraat), where two teams are rowing together in the direction of Ouderkerk.
National rowers wear their Dutch shirt under the club jersey, white with an orange band on the arm.
In addition to the live competition report, there is also an evening to listen to various interviews and the races of the past day are analyzed.