Three Forks is where the headwaters of the Missouri come together — Jefferson, Madison, Gallatin — and where the 1808 escape from Blackfeet warriors became the most-told single anecdote about Colter. The story needs careful telling: the Blackfeet were defending homeland during a generational conflict that began with the Two Medicine killing on the 1806 Lewis & Clark return. This profile leads with that context.
The Three Forks headwaters sit in Blackfeet (Niitsitapi) country, with adjacent use by Shoshone and Bannock. The Blackfeet were a major military and trading power in 1808, contesting the headwaters country against expanding American fur-trade incursions.
The famous 'Colter's Run' — an 1808 incident in which Colter and a companion (John Potts) were intercepted by Blackfeet warriors, Potts killed, Colter stripped and given a head start, then chased — is usually told as a personal-survival story. It is also a moment in a generational conflict: the Blackfeet were defending homeland during a period that began with the killing of two Piegan Blackfeet by Meriwether Lewis on Two Medicine River in July 1806 and extended through decades of intensifying violence.
The framing of this profile is co-authored — Phase 1 carries the Blackfeet context plainly; Blackfeet THPO consultation precedes any deeper publication.
Colter's 1808 expedition with Potts was a trade trip for the Missouri Fur Company, not exploration. They were trapping the headwaters drainage when intercepted. The fur-trade economic geography — Lisa's post at Three Forks (built 1810) follows this incident — is the structural context.
The standard telling: Colter and Potts on the Jefferson River in 1808 are surrounded by a Blackfeet party. Potts resists and is killed. Colter is stripped, given a brief head start, and pursued on foot. He outruns most of the pursuit, kills one warrior with a captured spear, and hides under brush in the Madison River. He walks roughly 200 miles back to Lisa's Fort Raymond, naked, over about 11 days. He arrives near death.
The incident is the single most-told story of Colter's life. It is also the one most in need of structural reframing — which is why this profile leads with the Blackfeet chapter, not the run itself.
The exact location of the interception (multiple candidate sites are argued near the Jefferson-Madison-Gallatin confluence). The exact route Colter ran. The number of Blackfeet in the pursuit party. The internal motivation of the Blackfeet leadership — recoverable only through Blackfeet oral tradition, not the surviving American written sources.
Missouri Headwaters State Park at Three Forks, MT preserves the confluence. The town of Three Forks has the Headwaters Heritage Museum. Multiple HMdb markers on the route name Colter's Run; the map renders them. The country is open and approachable from I-90.
Phase 3 target: 360° at Missouri Headwaters State Park; co-produced audio segment with Blackfeet THPO if the partnership lands. Pairing with the Fort Raymond endpoint.
Sources & attribution: Blackfeet Nation THPO (consultation pending) · Missouri Headwaters State Park · Headwaters Heritage Museum · Burton Harris (1952) · Discover Lewis & Clark