Across
- 4. a Belgian Catholic priest and member of the Society of Jesus (Jesuits)
- 5. a British officer of the Royal Navy who explored and charted North America's northwestern Pacific Coast regions
- 6. a confrontation in 1859 between the United States and United Kingdom over the British–U.S. border in the San Juan Islands
- 12. A fur trading business
- 13. the first Governor of the U.S. State of Washington
- 15. an American explorer,and soldier
- 16. the woman who helped the Lewis and Clark Expedition
- 18. the first non-Native American woman to climb Mt. Rainier
- 19. the encampment of the Lewis and Clark Expedition
- 20. a United States policy that opposed European colonialism in the Americas
- 21. the founder of the city of Seattle
- 23. a Chinook word meaning by and by, the unofficial state motto of Washington
- 24. a prominent member of the Astor family and a real estate developer
Down
- 1. a Spanish Basque explorer of the Pacific Northwest
- 2. the 19th-century doctrine or belief that the expansion of the US throughout the American continents was both justified and inevitable.
- 3. governor of the Territory of Washington from 1853 to 1857
- 7. a territorial governor from Virginia
- 8. an international incident and political dispute between the Spanish Empire, the Kingdom of Great Britain, and the fledgling United States of America
- 9. a trade center built by the Hudson's Bay Company at Kettle Falls
- 10. a Greek pilot in the service of the King of Spain
- 11. a meeting in the Pacific Northwest between the United States and sovereign tribal nations of the Cayuse, Nez Perce, Umatilla, Walla Walla, and Yakama
- 14. a British explorer, navigator, cartographer, and captain in the British Royal Navy.
- 17. a Suquamish and Duwamish chief
- 18. a fur trading post that was the headquarters of the Hudson's Bay Company's Columbia Department, located in the Pacific Northwest
- 22. a conflict between the United States and the Yakama, a Sahaptian-speaking people of the Northwest Plateau, then part of Washington Territory, and the tribal allies of each
