In just this photo, I would guesstimate the average age of those in attendance hovers around the upper-40 range. YMMV
I went to my first Trump Rally on Oct 10, 2015. It was in Norfolk VA in front of the Battleship Wisconsin. There were 3500-4000 in attendance. (that number impressed me at the time...the venue was crammed with people) By far the largest demographic there was 40 and younger. I was amazed at the enthusiasm of the crowd.
I was 2 rows back from the stage and everyone around me were my age or older. This rally was where DJT unveiled his VA reform plan and they sat a bunch of vets behind the stage. They were all older too. So all during the event I was under the impression that everyone there was an old fart like me. I was amazed at the end when I turned around to leave how many young people were there...cheering their heads off.
I left that rally absolutely convinced that DJT would win the nomination and that he would beat Hillary.
Most of the time I think the world has gone to hell in a handbasket. Especially here in the United States. However, every once in a while I get it like a bat hit upside of my head, when I see the young families around us who are so patriotic, and God loving. The future of America, is bright, especially inPresident Trump’s second term. We will win this thing, it won’t be easy, and it’ll be ugly and horrible at times, but we will win.