How far can an HDTV antenna reach

[jrweiss]

Will an indoor antenna pickup stations 25 miles away

 

[kanewolf]

That depends on a lot of things. What the terrain around you is. Can you orient the antenna optimally (rotation)? In the US, you can use antennaweb.org to get an idea of what the recommended antenna size is for your zip code. You will also see the alignment (rotation from north) for the antenna.