I don’t think that’s the gotcha you think it is? What do you call a 6+ hour walk, a casual stroll? You have to bring water and food when you’re out for that long doesn’t matter where you go which is why I called it a hike. I can walk for 6+ hours in Seattle and be in walkable neighborhoods the entire time with proper sidewalks, shops, parks, and near transit to head back if I don’t feel like continuing to walk

The least walkable topography is near downtown where you have the one line, streetcars, and busses. There are several transit options to get in, out, and around the downtown hills; hell the monorail is still running if you are feeling fancy. Outside of downtown you have the one line that’s being expanded every day with busses leading out from it’s stops. I won’t say Seattle has it perfect or is the best but it is undeniably one of the better US cities for walking and they’re actively working to improve it in several ways