I doubt you'll run into any snakes in the forest, but that really depends on your area. If snakes are a big problem where you live, there's really not much you can do to prevent yourself from seeing snakes.
Wild snakes generally don't desire to be around humans. They'll probably slither away from you, or ignore you completely, as long as you do the same. You're huge and scary to them.
Be sure to wear boots to protect yourself from any potential snake bites.