Boulder Creek (Colorado)

Boulder Creek is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map , accessed March 25, 2011 creek draining the Rocky Mountains to the west of Boulder, Colorado, as well as the city itself and surrounding plains.

Route The creek is formed by two main tributaries rising along the Continental Divide: North and Middle Boulder Creek, and later joined by South Boulder Creek.

North Boulder Creek forms in a valley between Navajo Peak and Arikaree Peak on the Continental Divide, in the Green Lakes chain of lakes. The creek flows past the community of Switzerland Park to join Middle Boulder Creek.

Middle Boulder Creek rises as two forks from the Continental Divide: the North Fork rises in a cirque below Mount Neva and flows to the South Fork. The South Fork rises at Rollins Pass on the Continental Divide and flows to the North Fork. From the junction of the two forks, Middle Boulder Creek, long, flows east through the towns of Eldora and Nederland into Barker Meadow Reservoir, a water supply for the city of Boulder, before joining North Boulder Creek to form the main stem of Boulder Creek.

From its source at the confluence of the North and Middle Boulder forks, Boulder Creek flows down Boulder Canyon and through downtown Boulder. On the east edge of the city, the creek receives South Boulder Creek, which rises at Rogers Pass on the Continental Divide, just south of the Moffat Tunnel. South Boulder Creek flows through Rollinsville, Gross Reservoir, and Eldorado Canyon before leaving the mountains and curving past the south and east sides of Boulder to its mouth at Boulder Creek.

After leaving the city, Boulder Creek flows northeast into Weld County, where it joins St. Vrain Creek, and on to a confluence with the South Platte River. Its waters flow into the Missouri River and Mississippi River and, ultimately, the Gulf of Mexico.

Recreation Boulder Creek is a summer recreational spot for outdoor activities, including tubing, fly fishing, and wading. The annual Boulder Creek Festival, held along the creekside civic area between the library and Central Park, opens the summer season on Memorial Day weekend.Boulder Creek Festival

Fish species Fish surveys from 1990, 1995, and 2006 found the following species of fish in Boulder Creek.Haworth, M. R., & Bestgen, K. R. (2016). Survey of Fishes and Habitat of South Boulder Creek, Colorado, within City of Boulder Open Space and Mountain Parks Property (pp. 1–57, Rep.). Fort Collins, CO: Colorado State University. doi:https://warnercnr.colostate.edu/wp-content/uploads/sites/2/2017/10/LFL-202-Haworth-and-Bestgen-2017-S-Boulder-Ck.pdfBestgen, K.R., & Kondratieff, B. (1996). Fishes, Macroinvertebrates, and Habitat of South Boulder Creek, Colorado, within City of Boulder Open Space Property. 10.13140/RG.2.2.27446.29769.Steinmann, D. B., & Windell, J. T. (1990). Boulder Creek Fish Survey Application of Rabid Bioassessment Protocol V-Fish and The Index of Biotic Integrity at Boulder Creek Before and After Implementation Of Best Management Practices. E.P.O. Biology University of Colorado.

Common name Scientific name Native to Colorado? Image Sand shiner Notropis stramineus Yes Iowa darter Etheostoma exile Yes White sucker Catostomus commersoni Yes Creek chub Semotilus atromaculatus Yes Longnose sucker Catostomus catostomus Yes Fathead minnow Pimephalus promelas Yes Longnose dace Rhinichthys cataractae Yes Largemouth bass Micropterus salmoides No Bluegill Lepomis macrochirus No Common carp Cyprinus carpio No Yellow perch Perca flavescens No Plains topminnow Fundulus sciadicus Yes Black crappie Promoxis nigromaculatus No Brown trout Salmo trutta No Rainbow trout Oncorhynchus mykiss No Cutbow trout Oncorhynchus clarkia × mykiss No Golden shiner Notemigonus crysoleucas No Green sunfish Lepomis cyanellus Yes Pumpkinseed Lepomis gibbosus No Western mosquitofish Gambusia affinis No Central stoneroller Campostoma anomalum Yes Orangespotted sunfishLepomis humilis Yes

Boulder Creek (Colorado)

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