| Year | Achievement | Significance |
| 1731 | Appointed commander, Fort Kaministiquia (Lake Superior) | Base for western expansion |
| 1732 | Built Fort St. Pierre (Rainy Lake), Fort St. Charles (Lake of the Woods) | Extended French presence west |
| 1734 | Reached Saskatchewan River (via Grand Portage) | Access to prairies watershed |
| 1736 | Son Jean-Baptiste killed by Sioux at Massacre Island | Personal tragedy, continued mission |
| 1738 | Reached Mandan villages (North Dakota); sighted Rocky Mountains | First European to see Rockies from north |
| 1739 | Built Fort La Reine (Assiniboine River) | Key prairie hub |
| 1741 | Built Fort Dauphin (Lake Manitoba), Fort Bourbon (Cedar Lake) | Consolidated trade network |
| 1742-43 | Sons Louis-Joseph & François reach Wyoming (Big Horn Mtns?) | Farthest west by French |
Strategic Achievements
- Fort network: 8+ posts securing French claim to Hudson Bay drainage
- Trade monopoly: Diverted furs from English Hudson's Bay Company
- Indigenous alliances: Cree, Assiniboine, Mandan—critical for trade & intelligence
- Mapping: Provided data for later cartographers (e.g., Mitchell Map 1755)
Failure & Controversy
- Never found Northwest Passage (none exists at those latitudes)
- Recalled 1744 for mismanagement, debt, insufficient results
- Reinstated 1747 but died before returning west
Sons' Continuation
- Louis-Joseph: Reached Saskatchewan Forks, possibly Wyoming
- François: Explored Saskatchewan River system
- Jacques-René: Military career, died 1757
Historical Significance
La Vérendrye transformed the western Great Lakes from a frontier into a French commercial sphere, laying groundwork for the Métis culture and later Canadian westward expansion. He is commemorated in parks, highways, and universities across the Prairie provinces.