Are you all aware of CaFÉ? "Call For Entry" is an online art organization that has a lot of opportunities listed, including a recent over-50 exhibit.


Here's the link:
You have to sign up and then you can see all the listings and (generally) enter through the site. Their list can be sorted by date and by type of call, which makes it easy to use. FYI: I have one piece entered into a competition through them, but it was required for a competition that I had initially entered through a class I took. I really don't know how effective it is to apply to their offerings, but thought it might be of interest.
I forgot about that place. Yes, I've been signed up for a long time. Thank you for posting this for everyone!