1. On March 7, 1859, the Oregon Constitution was adopted by the Constitutional Convention in Salem. This document served as the framework for Oregon's state government and established important principles, such as the separation of powers, the protection of individual rights, and the establishment of public schools.

2. In 1877, Portland celebrated its first St. Patrick's Day parade on March 7. This event has since become a beloved annual tradition in the city, attracting thousands of participants and spectators each year.

3. On March 7, 1933, a major earthquake struck the town of Astoria, Oregon. The earthquake, which measured 5.6 on the Richter scale, caused significant damage to buildings and infrastructure in the area, but fortunately no one was killed.

4. In 1947, the Oregon State Police launched its first motorcycle patrol unit on March 7. This unit has since become an important part of law enforcement in the state, patrolling highways and responding to emergencies across Oregon.

5. On March 7, 1972, the iconic Tillamook Rock Lighthouse off the coast of Oregon was decommissioned by the U.S. Coast Guard. The lighthouse had guided ships through dangerous waters for over 70 years, but advances in navigational technology made the structure obsolete. Today, the lighthouse is a popular tourist destination and has been converted into a bed and breakfast.