1. On August 23, 1877, the Nez Perce War came to an end at the Battle of the Big Hole. The Nez Perce, led by Chief Joseph, were attempting to flee to Canada but were tracked down and attacked by the US Army at Big Hole in Montana. The battle resulted in heavy losses on both sides, but the Nez Perce ultimately surrendered a few weeks later.

2. August 23, 1903, marked the opening of Crater Lake National Park in southern Oregon. Crater Lake is known for its clear blue waters and stunning views, and is a popular destination for tourists and outdoor enthusiasts.

3. On August 23, 1927, Oregon Governor Isaac L. Patterson signed the state's first Eugenics Sterilization law. This law allowed for the forced sterilization of individuals deemed "unfit" by the state, including people with mental and physical disabilities, criminals, and the "feeble-minded."

4. August 23, 1970, was the start of the Oregon Vortex's public season. The Oregon Vortex is a popular tourist attraction in southern Oregon that features an area of naturally occurring optical illusions and strange magnetic fields that alter the perception of height and size.

5. In 2013, August 23 was designated as "Oregon Women Veterans Day" by Governor John Kitzhaber. The day recognizes the many contributions of women who have served in the armed forces and their unique challenges when transitioning back to civilian life.