Really? I guess it depends on what you want to do and what kind of shape you are in, but being in your 60's shouldn't rule out much of anything. I personally know people doing long tours and thru hikes well into their 70's and I am sure some do into their 80's. I am almost 62 and think I have quite a few more coast to coast tours in me and don't see why I couldn't do more extended tours if I wanted to.