Walk Portland and clear the fog block by block

FOG starts with the whole world hidden and lifts it only along the streets you actually walk. Portland has the smallest blocks of any major American city, which makes it one of the more rewarding places to watch the fog come off.

Short blocks and a river down the middle

Downtown Portland is built on 200-foot blocks, which means twenty of them to a mile and a corner every forty seconds. It is the reason the centre feels walkable out of proportion to its size, and it is why the fog comes off in a satisfying dense mesh rather than a few long lines.

The Willamette splits the city into east and west, and the address system splits it further into quadrants plus North. Northwest keeps the alphabet streets, Burnside, Couch, Davis, Everett, Flanders, and once you notice that you stop needing a map. The east side is a long, flat, relentless grid running out through Buckman, Sunnyside, Hollywood and beyond, broken only by Mount Tabor, which is a volcanic cinder cone with a road spiralling up it.

West of downtown the grid gives up entirely. The hills above Goose Hollow twist into switchbacks, and Forest Park sits on the ridge with something like eighty miles of trail inside the city limits.

A loop worth an afternoon

The obvious one is the river loop. Walk the length of Tom McCall Waterfront Park on the west bank, cross the Hawthorne Bridge, come back north along the Eastbank Esplanade with the freeway humming above you and a floating section under your feet, then return over the Steel Bridge. That is about three miles and it draws a clean closed ring on the map. Extend it south over Tilikum Crossing, which carries no cars at all, and you have around six.

For something with more texture, do a spine street. Hawthorne Boulevard from the bridge east to Mount Tabor, then up the cone and down the far side, is a good half day. Alberta Street in Northeast, Mississippi Avenue in North, and Division in Southeast all do the same job in fewer miles.

Rain, hills and how the map fills

The east side is the easiest large area you will ever fill in. The grid is flat, continuous and almost never dead-ends, so an hour of aimless walking clears a genuinely large rectangle and city percent moves visibly. The west hills are the opposite, a scribble of switchbacks and stairs where a lot of climbing produces very little revealed area, and Forest Park is trails rather than streets, so it reads as long green threads instead of blocks.

Then there is the rain. From October to May it is mostly drizzle rather than downpour, which is why locals do not carry umbrellas and do keep walking. It is a wet city, not a hostile one. The dry stretch from July to September is glorious and short. Plan to walk in the rain or plan to walk very little.

What FOG does

Every street on the map starts under fog. Walking, running or riding it clears it, permanently. Nothing counts unless you were physically there.

No account, no sign-up, no cloud, no analytics, no ads, no tracking. The map lives on the phone and can be exported whenever you like. Background exploring keeps revealing with the app closed and the screen off, so the phone can stay in a pocket out of the drizzle.

Exploring is free. A single purchase of USD 5.99, never a subscription, unlocks unlimited ranks, every character and history import from Google Timeline exports and GPX files. Ranks climb with area covered: Wanderer, Scout, Pathfinder, Explorer, Voyager. The collection covers 241 countries, 3,390 regions and 7,342 named places, and you collect them only by standing in them. For any city you have walked, FOG tells you what percentage of it you have lit up.

Questions people actually ask

Start with a dark map.

FOG is free to explore. No account, no subscription, and your map never leaves your phone.

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