List Of Past Free Days and Events in Colorado (2022) Looking for current free days and events in in Colorado (2022)? Check out the List of Free Days and Events in Colorado (2022) page. May 22, 2022 Museum of Outdoor Arts – Greenwood Village, ColoradoFree Admission from 2:00 p.m. to 6:00 p.m. Online registration is required. There will be 9 artists painting murals, pop up activities, and food trucks.Visit the Official Free Open Haus at Marjorie Park and Fiddler’s Green page to learn more. May 18, 2022 Free Day at Clyfford Still Museum in Denver, Colorado is on Wednesday, May 18, 2022 from 10:00 a.m. to 5:00 p.m. Walk-ins are welcome.Visit the Official Official Clyfford Still Museum Free Day page to learn more. May 13, 2022 Free Day at Four Mile Historic Park in Denver, Colorado is on Friday, May 13, 2022 from 10:00 a.m. to 4:00 p.m. Timed ticket required.Visit the Official Four Mile Historic Park Free Day page to learn more. May 12, 2022 Free Day at Colorado Railroad Museum in Golden, Colorado is Thursday, May 12, 2022 from 9:00 a.m. to 5:00 p.m. Timed ticket is required.Visit the Official Free Day at Colorado Railroad Museum page to learn more. May 10, 2022 Free Day at Denver Art Museum is Tuesday, May 10, 2022 from 10:00 a.m. to 9:00 p.m. Advance ticket reservations are encouraged. Limited tickets will be available onsite the day of. Visit the Official Free Day at Denver Art Museum page.