So which poses are best to tone up the glutes in particular? Well, most variations of the Locust pose will do this. Lying face down, lift and stretch your legs away behind you and hold for 3 to 10 breaths. You can do one leg at a time if you want. Chair pose or Awkward Pose are two more which strengthen legs and tone glutes. Pilates Leg Pull Prone with leg lifts is also a powerful strengthener for the glutes.
Of course the best way to learn these exercises is from a trained and qualified instructor and every new exercise regime should be discussed with your health practitioner.
Enjoy the snow and don't forget to tone up and burn those glutes the holistic way!