We had a strong rain storm pass by McKinney today. Rain is no big deal really, you just go slower and hopefully have some good rain gear on. Easy.
The real problems start once the rain passes and all the silt and dirt on the trails turns to the slipperiest and stickiest mud I have ever seen.
This stuff is doom to a bicyclist. This type of mud gets into everything: your brakes, fenders, gearing, etc. It's also as slippery as ice. If you see this stuff just be smart and turn around.