1) On May 22, 1960, a powerful earthquake of magnitude 7.2 struck near Hebgen Lake in southwestern Montana. The quake caused a massive landslide that killed 28 people and created a newly-formed lake, known as Quake Lake.

2) May 22, 1885 is also notable in Montana history as the day infamous outlaw Jesse James was killed by Robert Ford in St. Joseph, Missouri. James had ties to Montana, having reportedly lived in the state under an assumed name for a time.

3) On May 22, 1890, Montana's state capital was officially moved from Helena to its current location in nearby East Helena. The move was made possible by the completion of a new capitol building, which remains a prominent landmark in the city today.

4) May 22, 1916 marked the opening of the Beartooth Highway, a picturesque mountain road that winds through Montana and Wyoming. The highway is renowned for its stunning views and scenic beauty, making it a popular tourist destination throughout the year.

5) May 22, 1872 saw the enactment of the Homestead Act, which granted settlers the right to claim up to 160 acres of federal land for free. Montana was one of the states where this law had a significant impact, as it encouraged the settlement and development of many rural areas throughout the state.