Is it true?????????

The Bible doesn't tell us where he was at that time, but I'm sure there are many things we are not told in the Bible. Would it make a difference to the world if it turned out that Jesus spent time in the Himalayas? Probably not. I think he was enlightened enough long before he was 28 or 30 years old. I understand that when He was 12, he stayed behind on a family trip so that He could spend time with the priests in Jerusalem. (We aren't told whether he was learning from them or they were learning from Him. Maybe a little of both.)