Those that expect to have at least four weeks of the season (in some cases at weekends only) to go include Sugarbowl, Donner Ski Ranch and Mammoth Mountain in California, Alyeska in Alaska, Crystal Mountain in Washington State, Mt Bachelor in Oregon, Snowbird in Utah and Timberline in Oregon - which should open through to September.
"While most resorts are shutting down, our spring season is just getting started!" said a resort statement from Mammoth, which has up to 2.4m lying on upper slopes.
Also still open are Squaw Valley and Alpine Meadows in California (with Kirkwood also open this weekend) and Arapahoe Basin and Loveland in Colorado.
Mt Baker in Washington State still has the world's deepest sanowbase at 727cm (just over 24 feet) but plans to close for the season after the coming weekend.
On the East Coast Seven Springs ski area in Pennsylvania made history yesterday (Tuesday 24 April) by re-opening after around 20cm of new snow fell, making national headlines for the latest ever ski area opening in the region. Jay Peak in Vermont says it expects to re-open this weekend and has up to 30cm, of snow lying.