I was thinking the same thing lol. I recently watched that fucking awesome documentary about the original Woodstock (not that other abomination that happened much later that got cancelled early due to people becoming an unruly mob of idiots that started destroying everything within sight and setting everything ablaze. Quite literally lmao)
Anywho, it was called like... 3 Days of Peace or something? VERY badass watch btw, if only for the Jimi Hendrix performance at the end. But yea there was one interview they did with this young couple that hitchiked there and the dude looked very similar to the guy in this pic. Who knows? Maybe it's just a common 'look' for the time?