I was reading through some journals over on CGOAB. I got to this journal:
They talk about a problem with disk brakes and sand:
But we had one major problem: SAND! The bike threw up a sand and water slurry that covered everything moving on the bike. The grinding in the chans and gears was painful. We washed it off, but it was back in 2-minutes of riding. The greatest problem is the disk brakes. THe sand has worn down the pads to the point where we have no brakes at all. We will need to find a bikeshop to remedy the problem. In the mean-time, thank goodness it is flat.
I don't have disk brakes, but was curious if anyone else had a problem like this.