I just found this. But still need to know dates for sure. https://www.visitjohnstownpa.com/thunder-valley
I wasn't sure myself but called down to Days Inn Somerset and it's the weekend of June 27. Made my reservation for June 24th check in. I had originally booked off the week before, that when I thought is was supposed to be.
It looks like we will be arriving Wednesday and staying until sunday. We will be going on two to three all day rides we try to get back to days inn around 6pm each night. We have 6 guys going on the all day rides a few more are welcome to join us.