Montana’s largest county, Yellowstone County, likely won’t release its vote counts until around 1 a.m. Wednesday, according to the county’s supervisor of elections.

“So we’re probably looking at about 1,” said Kevin Gillen, general election field supervisor for the Yellowstone County Elections Office, at 9:30 p.m. Tuesday. “Maybe it would be good if we overestimated and could get them out earlier. We are aware of what we are doing here. As soon as that happens, we will start publishing.”

Gillen said the results cannot be released until voting is complete.

He expects Yellowstone and Gallatin counties to be the last to release results.

Voters endured long lines all day for the high-interest race, which features a presidential contest and a tight battle for the U.S. Senate.

A woman arrived at 2 in the afternoon and finished seven hours later, at 9 p.m.

“It was very, very cold and very, very windy,” Karen Landers said. “I am over 70 years old and I have health problems and it was painful. But I tell you, it was worth it. You know, I’ll do it again.”