Thoughts? They are not the same thing yet time and time again I see the terms used interchangeably on here.
Do people have no concept that a hill / mountain run doesn't have to go on endlessly to find it's champ? Isn't the World Mountain Running Championship a six miler? It's about seeing who has the best engine for an uphill course under constant pressure / pain from your body. In some respects not much different from hitting the wall hard running a 5k. This is not what ultra "running" is.