I think everyone here is being a bit cavalier when they say "it's never too late". Sure, just like it's theoretically never too late to start a company or even run for president. In reality, mentors tend to gravitate toward younger mentees. There are various reasons for this. Younger folks tend to be, in general, more enthusiastic and less knowledgeable and experienced -- fertile ground when you have something to give as a mentor. Obviously not an absolute but definitely something to consider when you are older yet still looking for a mentor. I think there is also something alluring to mentoring younger folks you think are talented that has to do with getting the chance to help have a hand in some outsized success the young mentee might experience. Ostensibly younger folks have more time to achieve this success so perhaps they seem like a better bet to invest time in as a mentor however unconscious that decision may be on the mentor's part. I'm well into my thirties and do plenty of mentoring but I wish I had mentors of my own still. They get harder and harder to find every year of age and experience I get and I find it to mostly be due to the reasons above.