Loveland ski area, one of the world's highest, located in Colorado, USA, has set its "start of snowmaking for next season" clock going on its website at: https://skiloveland.com/
The resort joins in an annual battle to be the first in the US to open each fall, and aims to start snowmaking at the end of September, so long as it's cold enough.
Other ski areas nearby including Arapahoe Basin and Keystone usually begin snowmaking around the same time. Last year Arapahoe Basin opened on the 23rd October and Keystone opened on the 28th but Loveland didn't open until early November.
However recent years have seen ski areas in the Midwest manage to open for the season first in North America, using snowmaking systems to create small terrain parks and snow-play areas in early-mid October.
One ski area is currently still open in North America, Timberline in Oregon, after Mammoth Mountain ended its 22-23 season after 9 months last weekend. Mammoth says it plans to open for its 23-24 season in three month's on November 10th.