St. Vrain Creek (often known locally as the St. Vrain River) is a tributary of the

South Platte River The South Platte River is one of the two principal tributaries of the Platte River. Flowing through the U.S. states of Colorado and Nebraska, it is itself a major river of the American Midwestern United States, Midwest and the American Sout ...

, approximately long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data
The National Map
accessed March 25, 2011 in north central

Colorado Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of t ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

. It drains part of the foothills north of

Boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In c ...

and the

Colorado Piedmont The Colorado Piedmont is an area along the base of the foothills of the Front Range in north central Colorado in the United States. The region consists of a broad hilly valley, just under 5000 ft (1500 m) in elevation, stretching north and northe ...

area in the vicinity of Longmont. The creek is formed by the confluence of North and South St. Vrain creeks at

Lyons Lyon,, ; Occitan: ''Lion'', hist. ''Lionés'' also spelled in English as Lyons, is the third-largest city and second-largest metropolitan area of France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of th ...

. The creek rises in several branches in the foothills of the Front Range northwest of Boulder. Middle St. Vrain Creek rises along the

continental divide A continental divide is a drainage divide on a continent such that the drainage basin on one side of the divide feeds into one ocean or sea, and the basin on the other side either feeds into a different ocean or sea, or else is endorheic, not ...

, west of

St. Vrain Mountain ST, St, or St. may refer to: Arts and entertainment * Stanza, in poetry * Suicidal Tendencies, an American heavy metal/hardcore punk band * Star Trek, a science-fiction media franchise * Summa Theologica, a compendium of Catholic philosophy an ...

. It descends in canyon to flow along State Highway 7 and past

Raymond Raymond is a male given name. It was borrowed into English from French (older French spellings were Reimund and Raimund, whereas the modern English and French spellings are identical). It originated as the Germanic ᚱᚨᚷᛁᚾᛗᚢᚾᛞ ( ...

. It joins the shorter South St. Vrain Creek about two miles below Raymond. Parts of the South St. Vrain Creek form a Class 5+ kayak run during normal flows. North St. Vrain Creek rises northeast of St. Vrain Mountain near

Allenspark Allenspark is an unincorporated town, a post office, and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States. The CDP is a part of the Boulder, CO Metropolitan Statistical Area. The Allenspark po ...

and descends in a remote canyon to the east along

U.S. Highway 36 U.S. Route 36 (US 36) is an east–west United States highway that travels approximately from Rocky Mountain National Park, Colorado to Uhrichsville, Ohio. The highway's western terminus is at Deer Ridge Junction, an intersection i ...

. The two branches join at

, at the mouth of the canyon. East of Lyons, the combined stream flows southeast through farmland and ranch country, passing south of Hygiene and entering Longmont. It passes through the south side of Longmont where it is rimmed by a greenway trail and several parks. East of Longmont it flows generally northeast, meandering through a wide river bottom in ranch country and passing under

Interstate 25 Interstate 25 (I-25) is a major Interstate Highway in the western United States. It is primarily a north–south highway, serving as the main route through New Mexico, Colorado, and Wyoming. I-25 stretches from I-10 at Las Cruces, New Mexic ...

south of the intersection with State Highway 66. It joins the South Platte from the west just upstream from the ruins of Fort St. Vrain and approximately northwest of Platteville. St. Vrain Creek is joined by Left Hand Creek south of Longmont and Boulder Creek east of Longmont. The stream was named after

Ceran St. Vrain Ceran St. Vrain, born Ceran de Hault de Lassus de Saint-Vrain (May 5, 1802 – October 28, 1870), was the son of a French aristocrat who immigrated to the Spanish Louisiana in the late 18th century; his mother was from St. Louis, where he was bor ...

, a pioneer trader.

References

Rivers of Boulder County, Colorado Rivers of Weld County, Colorado Rivers of Colorado Tributaries of the Platte River {{Colorado-river-stub

See also

References