1. In 1905, the Lewis and Clark Centennial Exposition closed in Portland after six months of celebrating the 100th anniversary of the Lewis and Clark expedition. The fair attracted over 1.6 million visitors from around the world.

2. In 1910, the Mount Hood Loop Highway was officially opened, providing access to the scenic wonders of Mount Hood and the Cascade Range. Today it is a popular tourist route and designated as a National Scenic Byway.

3. In 1924, the Oregon State Highway Commission approved the construction of the Pacific Highway, which eventually became US Route 99. The highway connected California to Canada, and helped spur economic development throughout the state.

4. In 1959, the Oregon Zoo (formerly known as the Portland Zoo) opened in Washington Park after relocating from its previous location in southwest Portland. The zoo is home to over 2,600 animals representing more than 200 species.

5. In 2014, a massive wildfire known as the Oregon Gulch fire burned over 36,000 acres in southern Oregon, destroying dozens of homes and forcing hundreds of residents to evacuate. The fire burned for several weeks and was finally contained on August 19.