US: How should I use feet/yards/miles?

I'm trying to localise an app for the US. The app shows a list of places with distances that are relatively close, so either walkable less than a 10 minute drive away. Currently if the distance is over 1km then I show the distance in metres, so the list looks like this:

• 100m away
• 1.1 km away

What do you think makes sense for the US? Should I switch down to yards or feet or both and where does it make sense to make the switch? I know that it's common in the US to use a quarter mile as a distance, so maybe it makes more sense just to use miles that can be a fraction, so 0.2 mi.

US people, please help me out!