The Spring Flood Run is next Saturday, April 19th (no, it doesn't move because of Easter).
I have ridden the Spring run 5 times since 2008 and ridden the Fall run 4 times. It's always a good time and a fantastic area to ride. You can find lots of photos and blog posts on my Guide to Local Events page.
Last Spring's run was REALLY cold. Here's a photo and, yes, that's fresh snow on the ground.
Let's hope for much warmer weather this year.