I was lapping area around Petticoat yesterday between 1pm and 3pm and set a skin track up almost to the rock band. I did two laps there and another a little further to the east in the aspens. After I got done I was around Snowpine lift and while looking back to where I was I noticed that a section about 10 feet wide slid right through my switchback. Today (19th) I went up to the same general area to see what happened and while staying on the low angle section of the hill it looks like the length of the slide was about 200 feet and it started next to the rock band. It looked like a wet slide likely from afternoon heating.