I can ski many blue and some black trails at other mountains but not at Sun Valley. Green trails are equivalent to difficult Blue and Black trails at other resorts. Green trails are concentrated at the top of the mountain at Seattle Ridge with only two green trails to the very bottom. With flat light conditions plus difficult slopes I decided to go to Dollar Mountain and had a reasonable time on an a 500 ft hill. Staff was great and very helpful but overall I was disappointed. Too bad, i was really looking forward to Sun Valley.