KEYSTONE, Colo. — Keystone Resort is delaying opening day because of the “unseasonably warm weather,” it was announced Tuesday.

“We have made the difficult decision to delay Keystone’s opening day, which was originally scheduled for Friday, Nov. 4,” officials said.

The resort is now hoping to open Nov. 11.

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In an effort to provide our guests with the best early-season conditions possible, we have made the difficult decision to delay Keystone's 2016/17 Opening Day. Unseasonably warm weather in recent weeks has hindered snowmaking capabilities and Mother Nature has not allowed us to create the quality snow product that we’re dedicated to providing for our guests. With a more favorable weather outlook for the end of this week and early next week we are targeting Friday, Nov. 11 for Keystone’s opening. Please follow the link in our bio for information & daily updates 👆

A post shared by Keystone Resort (@keystone_resort) on Nov 1, 2016 at 10:16am PDT

October 2016 was officially the fourth-warmest October on record, according to the National Weather Service. Temperature records go back to 1873.

Only Arapahoe Basin Ski Area has opened in Colorado.