Walk San Antonio and burn off the fog
San Antonio hides its best walking a level below the street. FOG starts the whole map dark and clears only where you go, and the River Walk turns into a long bright thread through the middle of it.
A city with a second street plan
Downtown San Antonio has two layers. Up top is an irregular old Spanish plan around Main Plaza and Alamo Plaza, with streets that bend and change names. Below it, the River Walk (the Paseo del Rio) runs one storey down along the San Antonio River, a horseshoe loop through the centre lined with cypress, stone bridges and restaurant terraces.
The river path keeps going well past the tourist loop. The Museum Reach runs north to the Pearl, the old brewery district, and the Mission Reach heads south past the four Spanish colonial missions that make up a World Heritage site. Together the reaches make a walkable river corridor of around 15 miles.
A route that lights up a lot of map
Start at the Pearl and walk the Museum Reach south into downtown, then do the full horseshoe loop at river level. Climb out at La Villita, the little old quarter by the river, and walk south through the King William district, where the big nineteenth century houses sit under pecan trees.
On a second day, take the Mission Reach trail from the southern edge of downtown toward Mission Concepcion and Mission San Jose. It is flat, shaded in stretches, and it draws one long clean line south across the map. The Alamo and Hemisfair, with the Tower of the Americas, fill in the east side of downtown in an hour.
Heat and the numbers
Summer is the constraint. From June to September afternoons run in the upper 90s and the river level only helps a little. Walk early, or keep the long reaches for October through April, when the weather is about as good as walking weather gets.
The central few square miles fill quickly. Past them San Antonio is a big, spread out city built for cars, and the percentage of the city you have lit will rise fast and then flatten. The river corridor is where the satisfying lines come from.
How FOG keeps score here
FOG starts with the whole world under fog. Every place you physically walk clears a circle of roughly 400 feet around you, and that ground stays clear for good. It keeps working with the app closed and the screen off once you allow background location, so the walk to dinner counts as much as the planned loop.
There is no account, no sign-up and no cloud. The trail lives on your phone and nowhere else, and you can export a GPX backup whenever you like. Exploring is free; one purchase of FOG Unlimited adds the higher ranks, all five character paths and history import, with no subscription.
Questions people actually ask
How long is the River Walk?
The downtown loop is short, but the Museum Reach and Mission Reach extend the river path to roughly 15 miles in total.
Can you walk to the missions?
Yes. The Mission Reach trail follows the river south from downtown past Mission Concepcion and Mission San Jose, and on to San Juan and Espada for longer days.
Does FOG work for running and cycling too?
Yes. It clears fog for walking, running and riding, anywhere on Earth, in the same way.
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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