The event’s evolution in Denver reflects social and political changes affecting the gay, lesbian, bisexual, and transgender (GLBT) community through the decades. Contact National & State Register StaffĪlthough no designated landmark pays tribute to Denver’s gay and lesbian history, the annual PrideFest celebration has anchored the community since June 1974.Recent Listings in the National & State Registers.Colorado State Register of Historic Properties.Preservation Planning Unit Resource Center.Office of Archaeology & Historic Preservation.