How to Perfect the Art of Cornering on a Mountain Bike
To corner on a mountain bike, approach the turn with your body lean towards the inside, while keeping your weight centered over the bike. Look through the turn towards where you want to go and maintain an easy, steady speed. Brake before a turn, not during it. As you exit the turn, push hard on your outside foot, straighten your arms, and raise your body up and over the handlebars to improve traction and control.