[soapbox begin]

Here in the Northeastern US, riding on the trails in the rain isn't a great idea. Trails can sustain some significant damage when this happens - erosion, trail widening (because people ride AROUND rather than THROUGH the puddles), etc. We try to avoid getting out if it is raining, or has rained for a significant amount of time (like the past two weeks!).

Please think about your impact when riding in the rain

[soapbox end]

Now, having said that, I have ridden and raced off road in the rain (yes, I am contradicting myself here, but often race promoters don't worry about the impact they are having - and with 300+ racers, it's significant!).

The log overs are going to be SLICK when wet. Keeping your butt planted is a better idea to help with traction, whenever possible. If you are going over roots, doo it at a perpendicular angle whenever possible - sliding out on these is a given in wet conditions. Rocks can also be a challenge (I have found this out more than once the hard way).

Do you have V-Brakes or discs? Discs should work just as well in the wet as they do in the dry. V-Brakes, however, will take more finesse when it's wet, and more stopping time.

Good tires, planting your weight, and feathering the brakes should definitely help you in riding wet conditions, but even the best of us slip on the logs, roots and rocks!

SheFly