1. Oregon became a state on March 10, 1859: After a long struggle to gain statehood, Oregon finally gained admission to the Union as the 33rd state. This was a significant event in Oregon's history, as it marked the beginning of a new era for the young state.

2. OHSU was established on March 10, 1887: The Oregon Health & Science University, a well-respected medical school and research institution, was established on this day. OHSU has been instrumental in improving healthcare in Oregon and beyond.

3. Portland's renowned Japanese Garden opened on March 10, 1963: This tranquil oasis in the heart of Portland is considered one of the most authentic Japanese gardens outside of Japan. It's a popular attraction for visitors and locals alike, and it continues to be an important part of Portland's cultural scene.

4. John McLoughlin, the "Father of Oregon," died on March 10, 1857: McLoughlin was a prominent figure in early Oregon history, serving as the chief factor for the Hudson's Bay Company's operations in the Pacific Northwest. He played a key role in the development of the region and remains an important figure in Oregon's history.

5. The Dalles Dam was dedicated on March 10, 1957: The Dalles Dam is a hydroelectric dam on the Columbia River, and it was a significant engineering feat when it was constructed. The dam has played an important role in the development of the Pacific Northwest, providing power and irrigation to the region.