Colorado Revised Statutes Title 1. Elections § 1-13.5-601. Hours of voting

At all elections held under this article, the polls shall be opened at 7 a.m. and remain open until 7 p.m. of the same day. If a full set of election judges is not present at the hour of 7 a.m., an alternate election judge shall be appointed by the designated election official or judge in attendance at the polling place. The polls shall be opened if at least two election judges are present, even if the alternate judge has not arrived. Every person otherwise qualified to vote who is standing in line waiting to vote at 7 p.m. may vote.