By the late 1890s, bonanza farming had stopped bringing good incomes to large landowners. Immigrants who arrived in northwestern Minnesota learned quickly that the Red River Valley soil was some of the richest in the state. An experiment station was started in 1895 that led to the founding of a boarding high school to train young people to work on farms as farmers and homemakers.

The Chicago, Milwaukee, St. Paul and Pacific Railroad Company, better known as the Milwaukee Road, was a large railroad network that operated in the state of Minnesota for nearly 130 years. It provided freight and passenger service to many communities, playing a vital economic role. In 2017, much of the Minnesota route survives as a part of the Canadian Pacific Railway.

Oak savannas—open grassland studded by tall, spreading oak trees—once covered 10 percent of Minnesota, mostly in the southeast quarter of the state. They are an attractive ecosystem for animals such as deer, turkeys, and red-headed woodpeckers. Before European immigration, indigenous people valued the savannas for the good hunting they provided, fostering and maintaining them through the regular use of fire. In 2017, only about 1 percent of the savannas that existed 200 years ago remains.

In the late 1800s, as diversified farms began to replace large bonanza farms in Minnesota and across the U.S., Polk County farmers realized they needed help. National groups with local branches, like the Farm Bureau, formed to help farmers organize and improve their representation in laws and education. Farmers in the western part of Polk County—a particularly fertile area due to the Red River Valley’s rich topsoil—came to rely on their farm organizations as they adapted to the rising cost of transporting produce to city markets.

The Agricultural Extension Service of the United States (AES) began as an educational component of land-grant universities. In Minnesota as in other states, the federally funded and organized services of AES provide practical agricultural training to people outside of a university setting.

St. Paul’s Como Shops served as a major passenger-car repair facility on the Northern Pacific railroad between 1885 and the 1970s, providing employment to many St. Paul residents. The durability of the shops’ construction guaranteed their longevity, and in 1985 the facility was listed as a historic district on the National Register of Historic Places.

Solomon Comstock earned his law degree from the University of Michigan in 1869 but worked with railroads when prospects of finding a job in his chosen career path seemed dim. In Moorhead, he began a law partnership and traded in real estate with the Northwest Land Company. In the 1880s, he worked with James J. Hill’s Northern Pacific Railway to plat townships across Minnesota.

Fire destroyed Minnesota's first capitol building on March 1, 1881. The second capitol, completed in 1883, served as the seat of Minnesota state government for just ten years before state officials began planning a grander, more efficient capitol. The second capitol building stood on the site of the first capitol for fifty-five years until its demolition in 1937.

As Minnesota state legislators met on the evening of March 1, 1881, two days before the end of their twenty-second session, two pages alerted them to a fire in the building. Quick action by lawmakers and nearby residents saved important documents, furnishings, and historical collections. The fire took no lives but destroyed Minnesota's first capitol building.

Minnesota became a U.S. territory on March 3, 1849. After much debate, the new territorial government chose St. Paul as the permanent capital city. The first capitol building was completed in 1853 and served as the seat of Minnesota's territorial and early state government until it burned in 1881.