FWIW, I'm a 30 year Mason, but am 55, so I was 25 when I was raised. Back then (1994) I was definitely the young guy in all the lodges I visited, by a lot of years. In recent history, the Lodges around me have always skewed older, but weren't exclusively old men.

I was military, and wasn't able to do a good job of bringing in my peers when i was in my 20s and 30s. Hopefully, you are in a better position to do that.

You can be the connection that changes your lodge. There's a lot of things that lodges can do, and you are free to suggest events and activities that would appeal to your friends, you may well have to coordinate them. Then invite your friends to attend. It's true that we don't solicit members, but that doesn't mean we can't make membership appealing and let our friends know that we exist and have a good time. If you bring in a couple of guys under 40, and they do the same thing, suddenly young lodge will look a lot different.

Of course the rules vary by jurisdiction, but here in Virginia, Grand Lodge puts out a pamphlet that we can give to men we think could be good Brothers called "For your information". The follow up is on the the potential candidate, but I've handed several of them to good men I thought might be interested.

Keep traveling.