Answer:
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
No matter how hard you hit me, no matter how much I hurt, I'll always go for a laugh. What am I?
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
score in end zones.
I am a mountain at night meadow at day
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.