Snowpack trends over the past year at Castle Creek Near Aspen in an interactive calendar format. View seasonal patterns on the mountain and see how an evolving climate has affecting snowpack levels over the past year. Click on any day to see what the snowpack was for that day, or sign up for a free account to view data for the past 552 days. The snowpack average over the past 10 days was 11.85 inches, with a day to day variation of about 22.22 inches.