Also,
I have read that if you throw rocks at it and of course as everyone in here has suggested, make yourself look big, then you are good to go. I think the best, although it sounds freaking stupid, is to just throw big rocks at it. Try to inflict some pain, and it will be intimidated and leave. And for the most part, they are more afraid of you.
Here is the easiest tip to not be eaten: If you see deer or stuff that a carnivore the size of a ML could live off of, then you should NEVER EVER EVER ride there alone!! I ride alone around hundreds of California Rattle Snakes, but I have a Cell Phone, and I could make it to a hospital on time more than likely.....
Use your head, not your fists...
Matt