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  • Floodplain Map
  • Creeks of Boulder
  • Floodplain Development
  • Be Prepared
  • Community Resilience

The Creeks of Boulder, CO

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The city of Boulder is home to Boulder Creek, its 14 tributaries, and Boulder Slough (an irrigation channel). Additional information on current and past projects along specific drainageways can be found by clicking on the corresponding creek in the map below. *The boundaries outlined in the map are not intended to be representative of floodplains but are intended to be reflective of drainage areas within the city for each creek. 

Creeks and Creek Projects Map 

Boulder County Creek Recovery and Restoration Program

Boulder County Creek Recovery and Restoration Program

Irrigation Ditches

Irrigation ditches are manmade channels that deliver water to homes, farms, industries and other human uses. Most irrigation ditches divert water from natural creeks and rivers and bring it to other areas..