Update 7:10 p.m. A group of four people riding horses promoted their political ideology by riding in front of the line of voters outside MetraPark.
Around two state legislative candidates were being promoted with signs on cars in the MetraPark lower parking lot.
Montana state law says no political signs can be displayed within 100 feet of a polling place, which at the Montana Pavilion extends just about to the first row of parking spots.
Of about 99,000 registered voters, about 79,000 had turned in their ballots by around 4 p.m. Tuesday in Yellowstone County.
Wait times appear to be over an hour for those needing to register to vote or get a replacement ballot.
When polls close at 8 p.m., election staff will place someone at the end of the line outdoors and not allow any more people to get in it.
This is a developing story.