A total of 2,507,472 ballots had been returned in Colorado by 9 a.m. on Election Day. There are a total of 4,045,182 total active voters in the state. According to the Secretary of State's Office, that number includes 2,

In Colorado, in-person polling locations open at 7 a.m. and close at 7 p.m. Voters who are in line at their polling location by 7 p.m. are allowed to vote no matter how long it takes for each person to cast their ballot.

In some states, you had to be registered to vote last month. In others, you could wait until Tuesday when you actually vote.