1. On August 11, 1877, the Nez Perce War ended with Chief Joseph surrendering to the U.S. Army in Montana. While the conflict did not take place in Oregon, the Nez Perce tribe is historically significant to the state and many of their traditions and practices still influence Oregon culture today.

2. In 1921, on August 11, the Oregon State Police were officially organized. This law enforcement agency played a crucial role in enforcing Prohibition in Oregon and combating organized crime during the 1920s and 1930s.

3. On August 11, 1934, the John Day Dam began construction. As part of the Columbia River Basin Project, this dam was one of several built on the river in the mid-20th century to harness its hydroelectric power and regulate its flow for irrigation and shipping.

4. In 1986, August 11 marked the first day of the first official Pickathon, a music festival held annually at Pendarvis Farm in Happy Valley, Oregon. With a focus on sustainability and showcasing local and emerging artists, this festival has become a beloved part of Oregon's vibrant music scene.

5. August 11, 2019, was a day of celebration for Oregonians as Governor Kate Brown signed a law allowing students to take "mental health days" as excused absences from school. This groundbreaking legislation aimed to prioritize students' mental health and reduce the stigma surrounding mental illness.