Welcome to the world of mountain bike rides. If you don't have to carry it on at least some portion of the ride it is not a real mountain bike ride. 

The second thing is this. Years ago I was taught to ski. My first trip to a ski mountain was at Lake Eldora Ski Area. My instructor was the one and only Roger Olander. He said, "This is called a snow plow," and started down the mountain.  Almost instantly he struck a ponderosa pine. In my wisdom I instantly knew I had one of the truly great ski instructors. It might have been a douglass fir. It was a tree that much I know and I know Roger is still one of those tree huggers.

Mike S