A mask-wearing requirement for Colorado first went into effect in July 2020 and recently was amended in Executive Order D 2021 103 on May 14, 2021.
The amended Executive Order states that fully vaccinated people can go without masks in public indoor spaces unless the setting requires otherwise.
Unvaccinated people over age 11 are encouraged to continue wearing masks in all public indoor spaces where members of different households are present.
Masks are still required in certain settings, including in schools for unvaccinated students, teachers, and staff, as well as other settings which are laid out in the Executive Order. Local communities and businesses may have additional mask restrictions.