Answer:
I begin and have no end and I end all that begins. What am I?
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I always run but never walk often murmur but never talk have a bed but never sleep has a mouth but never eat.
In my life I must bare, my bloodline I must share. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?