Does Riding Gravel not maintain an event calendar anymore? It was nice having a fairly comprehensive single source rather than having to know of 6 or 7 websites to check in order to find out about rides within travel distance of me.
I've had the best luck with BikeReg for local events. Entering location and radius gives me almost everything within driving range. https://www.bikereg.com/Events/
We ended that a long time ago. Nobody wanted to pay for anything, wanted their event listed, and then many users came to us for issues about the events. Recipe for a no go. Unless we could find someone to pay for it somehow and, in return, pay someone to maintain it. So, yeah, the calendar is done for us.