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.
who do you think you know but sometimes you don't
Bright as diamonds, Loud as thunder, Never still, A thing of wonder.
When the horse strokes the cat, the wood begins to sing.
By the way, what never moves, wears shoes, sandals and boots, but has no feet?
What is always coming but never arrives?