Johannesburg clears in pockets, not sweeps
FOG hides the whole world map under fog and clears only what you physically walk. Johannesburg is a car city with a handful of excellent walking districts, and the map shows that plainly.
Altitude, ridges and a grid that stops
Johannesburg sits at about 1,750 metres on the Highveld, and you feel it on the first hill. The city is draped over a series of east-west ridges, so streets in Parktown, Westcliff and Observatory climb properly, while Sandton and much of the northern suburbs roll more gently.
The inner city, from Braamfontein through Newtown, Marshalltown and Doornfontein, is a proper grid of short blocks laid out on the old mining camp lines. It is the most walkable part of the city and it fills in quickly. Outside that core, the pattern breaks apart into curving suburban streets, walled properties, cul-de-sacs and long arterials like Jan Smuts Avenue, Oxford Road and Louis Botha Avenue. Those suburbs are green and pleasant but they were designed around driving, and it shows in how few continuous pedestrian routes exist.
Johannesburg is also famously a man-made forest. Walking through Parkview, Melville or Saxonwold in autumn is genuinely lovely, and the tree canopy is thick enough to be visible from the air.
Where walking actually works
Braamfontein has students, short blocks and real street life. Maboneng in the east of the CBD is compact and made for walking. Newtown links across to them. Melville's 7th Street is a small, dense strip you can cover in twenty minutes. Parkhurst's 4th Avenue is similar. Rosebank and the area around the Keyes Art Mile are walkable at neighbourhood scale.
A good afternoon: start at Constitution Hill in Braamfontein, walk down through the Braamfontein blocks, cross into Newtown past the Nelson Mandela Bridge (worth walking for its own sake), then work east through Marshalltown toward Maboneng. That is a continuous line through the historic core, mostly flat, and it clears a dense rectangle of the inner city.
The other kind of day is greener. The Braamfontein Spruit trail runs for many kilometres north through Delta Park, Craighall and Sandton along the stream. It is a continuous off-road corridor and it draws a long, unbroken line up the map that no suburban street walking will match.
Why the map fills the way it does
Expect islands. Your Johannesburg map will show a bright inner-city block, a few small neighbourhood patches, the green thread of the Spruit, and a lot of untouched suburb between them. That is not a failure of effort. It is an accurate portrait of a city where most people move between destinations by car and walk only once they arrive.
The inner city rewards you fastest because the blocks are small. Twenty short blocks is a satisfying amount of cleared area. The northern suburbs are the opposite: long blocks, high walls, no destinations to string together, so an hour of walking buys you very little visible map.
The Spruit and the parks are the exception, and the reason a lot of people here end up covering ground on a bike instead. FOG works for riding too, which changes the arithmetic considerably.
Practical notes
Climate. The walking is good most of the year. Winter is dry, cold at night, sunny and clear during the day, which makes it excellent for long walks. Summer afternoons bring hard, short thunderstorms, usually late in the day, so walk in the morning.
Altitude and sun. Thin air and strong sun. Both are easy to underestimate on your first long walk here.
Route choice. Walk where other people are walking. That is ordinary local judgement in this city, and it also happens to point you at the districts where the map fills fastest.
FOG keeps recording with the app closed and the screen off, so the phone stays in your pocket. No account, no cloud, no ads, no analytics, and your map never leaves the device.
Questions people actually ask
Is Johannesburg a good city for this?
It is an honest one. Most of the city is not walkable, so your map fills in pockets. The inner city, Melville, Parkhurst and the Spruit trail all reward it.
Does cycling the Braamfontein Spruit count?
Yes. FOG works for walking, running and riding, and the Spruit clears a long continuous corridor.
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