It's printed right on the tire to inflate to 65 PSI - something sellers don't print on their websites.
These tires are great! They grip and roll very well over pavement, grass, and wet earth that's ridable.
I have a Trek Marlin 7 (2019) and these fit just fine. They are definitely heavier than the original nubby tires that came with the bike but I have absolute confidence they'll hold up for a long long time and I'm faster with them because of the smooth rolling surface.