I took my daughter on her first trip to the Rockies and we weren't disappointed by Keystone. She took group lessons for the full day and it was well worth it. She was 11 at the time and new to skiing. The instructor was great and she was confident and proficient by the end of the day. I was skiing the back mountains and BOY! what an experience! The crowds were sparse and I felt like I was alone on the mountain. The runs were fantastic with nicely groomed trails I would definitely go back to Keystone!