Depends on what you're going for. I've had a few students in their 60s even 70s. Leaning is lifelong for career and personal needs--knowledge, attitudes, skills--so there's no need to stop really. But you don't need college to continue to learn. Personally, I am on beyond ever going back for I have reached the point of no return in my needs. But that's just me. To each his / her chosen own. Peace!