May 1804 – November 1805
Westward Journey
The Corps of Discovery departed Camp Dubois on May 14, 1804, ascending the Missouri River through present-day Missouri, Kansas, Nebraska, Iowa, and the Dakotas. They wintered with the Mandan and Hidatsa, then continued west across Montana, over the Rocky Mountains with Shoshone and Nez Perce guidance, and down the Columbia River to the Pacific Ocean.
Pictured: Fort Mandan (winter) today, the place most written about in this phase.
Tribal Nations Encountered
10 nations · click for figure essay where availableCross-narrator analyses
598 in this phase546 comparisons of what each journalist wrote on the same date, and 52 profiles of the people and nations in this phase, each drawn from the cited journal entries. All analyses
Most Mentioned in This Phase
Counted from the names in this phase’s journal entriesMost mentioned people
- Capt Lewis (136)
- Capt. Clark (128)
- Capt. Lewis (115)
- Drewyer (84)
- Captain Lewis (79)
- Captain Clarke (77)
- Capt Clark (59)
- Clark (58)
- R. Fields (58)
- G. Drewyer (51)
Most mentioned tribes
- Indians (119)
- Mandans (101)
- Mandan (40)
- Sioux (40)
- Snake Indians (39)
- natives (35)
- Snake nation (22)
- Mahars (19)
- Souix (18)
- Ricaras (18)
Most mentioned places
- Missouri (235)
- Missourie (69)
- Fort Mandan (59)
- S. S. (30)
- island (28)
- Rocky Mountains (26)
- Columbia (26)
- creek (25)
Heacock Memorial Archive
5 articles in this date range




Heacock River Features
32 features in this date range, first 24 shownJournal Entries
1998 items
Key Figures
45 items
Wildlife & Plants
144 items
Artwork
25 items
Weapons & Equipment
26 items
Treaties
5 itemsDocuments
13 itemsAllied Sites
16 items
360° capture 1.5 mi away
360° capture 2.0 mi away
Nearest 360 · 18 mi Satellite · Esri
Nearest 360 · 5.6 mi Satellite · Esri
Research Articles
12 items