1. On May 3, 1850, the first steam locomotive arrived in Oregon, marking the beginning of a new era in transportation and commerce for the state. The 20-ton engine, named the Oregon Pony, was designed to pull freight and passengers along a newly constructed railroad connecting Portland and Milwaukie.

2. May 3, 1913, marked the opening day of the Eastmoreland Golf Course in Portland, which has since become one of the city's most popular and prestigious courses. Designed by renowned golf course architect Chandler Egan, the course features rolling hills, tree-lined fairways, and challenging greens that have tested some of the world's top players.

3. On May 3, 1967, Oregon Governor Tom McCall signed a groundbreaking environmental protection bill into law, known as the Oregon Beach Bill. The legislation guaranteed public access to all of the state's sandy beaches and coastal areas, ensuring that they would remain open and available for generations of Oregonians and visitors to enjoy.

4. May 3, 1979, saw the opening of the Oregon Museum of Science and Industry (OMSI) at its current location in Portland's Eastside industrial district. The museum features a variety of interactive exhibits, hands-on displays, and educational programs designed to inspire curiosity and scientific inquiry among visitors of all ages.

5. Finally, on May 3, 2007, the Portland Trail Blazers made NBA history by selecting Ohio State player Greg Oden with the first overall pick in the league's annual draft. Oden was highly touted as a dominant center with limitless potential, but injuries and other setbacks would ultimately derail his career, making his selection one of the most controversial in Trail Blazers history.