Everyone in Miami Beach calls it the boardwalk. There are almost no boards.
The original raised timber walkway ran roughly from 23rd Street to 46th, a narrow elevated structure that a generation of visitors remember for the sound it made underfoot. It was hot, splintery, hard to maintain on a salt coast and impossible to use with a wheelchair. It was replaced in stages, and the final segment of its successor was finished in June 2022: a wider, level, accessible paver promenade that completed a continuous route along the whole ocean edge of the city.
What exists now runs from South Pointe Park at the southern tip, north to the Surfside border — about seven miles of unbroken pedestrian shoreline. It changes surface and character as it goes, but you never have to leave it and you never have to cross a road. For anyone on foot, on a run, on a bike or pushing anything with wheels, it is the single most useful piece of infrastructure in Miami Beach and it is entirely free.
Through South Beach the route is the paved path inside Lummus Park, running behind the dune from 5th Street to 15th. North of 15th it continues as a paved promenade, and from around 21st Street it becomes the wide paver beachwalk that carries on through Mid-Beach and North Beach.
The other thing it gives you is the dune. The whole route runs behind a planted ridge of sea oats, sea grape and beach sunflower, fenced and signposted, which is both the island's first line of storm defence and, from May to October, sea turtle nesting habitat. You are kept off it deliberately, and there are marked walkovers where you cross to the sand.
Start at South Pointe, walk north, and stop whenever you like. The trolley runs back.