Is there a way to archive blog posts?

Site URL: http://balletsv.com/performance

Site URL: https://www.balletsv.com/performance

Page Password: sugarplum

Sorry if this is the wrong board! I run a blog on our dance studio's website for parents and dancers that acts as a hub for all information during our performance season. Therefore, once the show is over and we are ready for a new show, 90% of the posts become inaccurate to current info, and I'd like to be able to archive them or make them unlisted from the main blog page.

I can't find anywhere to do this, but wasn't sure if I'm missing something or if there is a similar enough function that would work? I don't want to straight up delete the posts because they are useful for archival purposes and reference for our office staff. I'm fine if they are still accessible by their URL, but I don't want them showing up in the main list of articles for anyone glancing at the page.

Currently, I just edited all of the articles to be "needs review" in order to effectively un-publish them; however, this leaves the dash pretty messy looking (see below), because it's just this huge chunk of articles that you have to scroll through when managing posts. To me, it seems like an inefficient way of doing what I'm trying to do, and I'd rather if we could just file them away. Let me know if there's something else I can do to keep these posts unlisted!

Great workaround Paul, I will use this method myself. 

Actually this is a 7.1 option that I don't have with 7.0 I did discover you can move posts to a blog page that is not enabled yet. This page can be in the unlinked section of your site, it should be actually if enabled.