1. On September 4, 1882, the Northern Pacific Railroad completed its line through Montana, connecting the east and west coasts of the United States. This allowed for easier transportation of goods and people, and helped to spur Montana's economy.

2. In 1975, on September 4th, the Montana State Prison hosted a famous prison rodeo that drew in a crowd of over 6,000 spectators. The event featured prisoners from the maximum security prison competing in various rodeo events, such as bronco riding and barrel racing.

3. Montana's first ever female chief justice, Karla Gray, was sworn into office on September 4, 2008. Justice Gray served on the Montana Supreme Court until 2016, and was known for her opinions that were often focused on civil liberties and individual rights.

4. The Montana National Guard was deployed to help fight wildfires in the western part of the state on September 4, 2017. The wildfires, which had been burning for weeks, had already caused significant damage and displacement for many residents. The National Guard helped to provide support and assistance to those affected.

5. September 4, 1933 marked the opening of Glacier National Park's Going-to-the-Sun Road, a stunning 50-mile stretch of highway that takes visitors through some of the park's most breathtaking scenery. The road, which took nearly 20 years to complete, remains one of the most popular attractions in Montana.