annular solar eclipse coming up on May 20th, there will likely be a number of caching events scheduled to celebrate. This will be the first annular eclipse visible in the western United States since 1994.
A quick search of the geocaching.com website for event caches with the key word, "eclipse" only produces one cache so far: GC3D5D8, but I suspect there will be more showing up soon. I also came across this event cache set to take place near Susanville, California: GC3HK9E, which sounds like a fun one.
So keep an eye out for an eclipse event cache coming near you. And remember to view the eclipse with proper eye protection.