Turnout for Colorado’s 2017 elections has so far been very low, with just 810,360 of the 3,243,593 ballots sent out to voters returned as of Monday evening.

Denver 2017 election guide $937 million bond package and the Green Roof Initiative are on the ballot

In Denver, officials said the turnout rate was just 17 percent by Monday morning.

Ballots returns over the weekend appear to have been relatively flat — on Friday morning roughly 612,000 ballots were returned — as the hours before Tuesday’s 7 p.m. election deadline slip away.

Registered Republican voters are holding the lead in early returns, casting about 307,691 ballots as of Monday evening.

Voters registered as Democrats trailed with 270,724 ballots returned in that period, while unaffiliated voters returned 222,358 ballots.

Voters ages 18 to 25 have returned the fewest ballots in Colorado this election cycle, as of Monday evening, while those ages 41-60 submitted the most.

Ballots have to be in the possession of Colorado’s county clerks by 7 p.m. on Tuesday, which means it’s far too late to mail them back. Instead, you must drop them off at a designated location. (Denver has 26 24-hour ballot drop-off boxes across the city.)

All but six of the state’s 64 counties are holding elections this year. The counties not participating in the fall election have no contested races or local ballot measures.

For the first time since 2009, the fall election ending Tuesday features no statewide ballot measures.

There are more than 3.7 million registered voters in the state. However, turnout for off-year elections is typically much smaller than during a presidential election year.

In Denver, about one-third of all ballots typically are turned in on Election Day itself.

“That’s Denver voter behavior,” said Alton Dillard, spokesman for Denver’s elections division.

Dillard said the Denver County Clerk and Recorder’s Office has seen an uptick in ballots returned on the Monday before Election Day and on Election Day itself. It’s urging voters to get their ballots in by Monday night so they don’t have to deal with the snow forecast for Tuesday.

Denver had 72,562 ballots returned by Monday evening, while Douglas County had 70,687, Jefferson County had 93,230, Larimer County had 61,334 and El Paso County had 114,175.

Denver voters are deciding on school board races, a nearly $1 billion bond package and the Green Roof Initiative.

Douglas County voters are embroiled in a high-dollar, high-tension school board contest.