Muscle ache

I have a muscle ache until I wake up this morning. The reason why must be yesterday's climbing. It's aching especially at back and thigh.
When we climb Mt.Yari-gatake, we have to walk during three continuous days. Is it possible by such condition? I often think that I'm too beginner to climb Mt.Yarigatake.
All I can do is training every day to that end.