Vitus Bering (1728, 1741): not one continent but two
Alexander Mackenzie (1789, 1793): in the far Northwest
George Vancouver (1791-94): mapping the coast
Robert Gray (1792): a claim on Oregon
Meriwether Lewis and William Clark: the great overland expedition (1804-06)
Zebulon Pike: where does the river begin? (1805-06)
Manuel Lisa: across the wide Missouri (1807)
Peter Skene Ogden: tough man in the Northwest (1824-30)
Epilogue: what did they find?
Important dates in the exploration of the Pacific Northwest.