DENVER -- As of Monday morning, around 75,000 Denver voters had turned in their ballots. 250,000 Denver voters have not.
The low voter turnout is somewhat expected. It's May and it's an off-year election.
"As usual, we see Denver voters are trending toward Election Day," said Alton Dillard, a spokesman with the Denver Elections Division.
Dillard said the anticipated turnout is around 25-30 percent.
However, the low numbers do create uncertainty as to how the results might go.
Of the six candidates running for mayor, four are considered major candidates: Lisa Calderon, Jamie Giellis and Penfield Tate are the main challengers to incumbent Mayor Michael Hancock.
Hancock, who is seeking a third term and is ahead in the polls, will need 50 percent of the vote, plus one, to avoid a runoff.
"The question is: Does low turnout impact Michael Hancock? That's the real question. There hasn't been a lot of oxygen in the race," FOX31 political analyst Matt Moseley said.
Mosely said the lack of interest could signal Denver voters are content with the status quo -- or it could mean only the challengers have enthusiasm.
Hancock faced a runoff election when he was first elected in 2011 but not in 2015.
"It's more likely that Hancock would have a run-off than not, so if he does have a runoff, it's not necessarily a sign of weakness or defeat," Mosely said.
It is too late to mail a ballot, but they can be dropped off at one of many 24-hour ballot boxes around the city until 7 p.m. Tuesday.