5/7 Colorado Railroad Museum Free Day
5/7 & 6/4 Molly Brown House Museum free evenings on first Thursday of each month
5/12, 6/9, & 7/14 Denver Art Musuem Free Day
5/14 & 5/15 Colorado MahlerFest
5/19 Wings Over the Rockies Air & Space Museum Free Day
5/20, 6/10, 7/8, 7/15, & 7/29 Museum of Outdoor Arts: Marjorie Park Free Day
5/22 Children's Museum of Denver at Marisco Campus: Joy Park Free Night
5/29, 5/30, 6/26, & 7/24 Four Mile Historic Park Free Day
6/9 & 7/1 Denver Botanic Gardens Free Day
6/14 & 7/26 Clyfford Still Museum Free Day
6/19 Denver Museum of Nature & Science Free Day
7/12 Colorado Music Festival & Center for Musical Arts Free Day