Sayulita, Mexico.
Running, and walking, in the soft sand can greatly improve your ankle and hip stability. Begin with short efforts though! The increase in the activation of the stabilizing muscles can be quite high, and quickly result in an overuse injury if you are not careful. Allow your muscles time to adapt to the new stresses by adding some walking, or short runs, in the sand. Mix these sessions in a bit each week and pay close attention to any new tightness or fatigue in the muscles around the ankles and hips. Enjoy!