The four new resorts opening have doubled the number of available ski areas so that the total number of ski areas available is eight, and they're located right across the country from East to West coasts.
Two ski areas opened in the Mid-West at lunchtime on Friday - Trollhaugen and Wild Mountain.
The first resort to open in California was Boreal which opened two runs on Saturday 30th with a base of up to 30cm (12 inches). The resort was the first to open in California last year too.
A third area has opened in Colorado at Wolf Creek.
These join Sunday River in Maine, Timberline in Oregon and Arapahoe Basin and Loveland in Colorado which are already open.
Most areas are currently open at weekends only.
It was less good news in Canada where Mount Norquay, which had planned to open on the 30th announced it was postponing with temperatures well above zero. Nearby Nakiska, also close to Banff in Alberta, has announced it will try to open next weekend on November 6th.
Back in the US, Copper Mountain and Keystone in Colorado also plan to open next weekend.