This is a great site for lost ski areas. Was on a ski team in the early '70s and must have skied them all. We practiced at night at klein innsbrook in Franklin and during the day Blue hills. Weird thing is I don't ever remember getting rained out of meet. Maybe once at prospect Hill in Waltham. Times they are a changin'...
https://www.nelsap.org/ma/bostonhills.html