In the winter of 1971, some newspaper staff at The Sun in Sydney had an idea borrowed from San Francisco: a road race that ordinary people could run, from the middle of the city all the way to the ocean. That first morning, 1,576 people set off from Town Hall. This Sunday, more than half a century later, about 90,000 will take on the same journey, 14 kilometres from Hyde Park through the harbourside streets, up the long pull of Heartbreak Hill, and then down, gloriously down, to the sand at Bondi Beach. City2Surf is now the largest fun run in the world, and it has raised more than 55 million dollars for charities since 2008, with recent years adding around four million dollars each run.

But ask a Sydneysider what the race really means and they will tell you something the record books miss. City2Surf lands at winter's end, and the city treats it as the turning of the season. Training runs have been getting lighter in the evenings for weeks. The morning of the race, the streets fill with costumes and music, and neighbours who have spent two months indoors are suddenly all outside at once, moving in the same direction, towards the water. When the finishers spill onto the beach, some go straight into the sea, tens of thousands of them through the afternoon, and the whole coastline hums. It is the day the city remembers that the ocean has been there all along, waiting, and that summer is on its way back. However you get there, on the day or any day after, the finish line is open all year: it is a beach, and it is beautiful.

An Earth to Sea News original. Race history and fundraising figures are from City2Surf's own history pages and event reporting. Photograph: Oliver Strewe, gifted to Earth to Sea News.