By Taylor Sienkiewicz, Summit Daily DILLON — Vail Resorts has announced Breckenridge Ski Resort, Heavenly Mountain Resort and Whistler Blackcomb will not reopen for spring skiing. CEO Rob Katz made the announcement via a letter Thursday morning. He explained that all of the communities the company operates are focused on creating timelines and guidelines for reopening for summer, which could have the lifts turning at resorts by late June or early July.