When you hit the slopes you will find that each run has a color and sign associated to that hill. If you are a beginner skier and are just learning the basics you may want to stick to the green circle hills as these tend to be quite simple and you will not have too much trouble getting down them. If you have been skiing for a year or so and are comfortable on your all-mountain skis you can not only hit the green circle runs but may also want to try the blue square runs as these are for intermediate skiers. If you have been skiing for years and consider yourself a pro on a pair of downhill skis, you will be able to handle the green and blue runs and will also be able to hit the black diamond runs which are for experts. So make sure to check out a map of the runs when you get to the ski hill to ensure you will be able to get down at your skill level without issue.