Keystone Resort Opening Day 2024 Schedule. Here are the expected opening dates for ski areas across colorado, though mother nature has a major hand in determining the true schedule. Arapahoe basin ski area and keystone resort in summit county, colorado announced they will open for the 2024/25 winter season on saturday, nov.

These dates are subject to change at keystone’s discretion based on weather and snowfall. Keystone resort opening day 2024!