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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

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Fall activities on the Columbia Slough


bike riders on the Columbia Slough trailTwo events coming up with the Columbia Slough Watershed Council are great opportunities to learn more about Portland’s unique water resources.  Sign up soon — space is limited in these popular annual events!

Bike the Levees

Date: Sunday, October 11th

Time: 10:00 AM -1:00 PM

Bring your bike and your friends for a tour of Portland’s levee system. The Multnomah County Drainage Districts and the Columbia Slough Watershed Council will lead this 15-mile trip on easy terrain. Learn about functionality and history of Portland’s levee system which protects people and properties from flooding the work being done to ensure that the levee system meets modern standards for public safety. Riders will explore how the levees are managed for the balance of safety, recreation, and restoration. Helmets required; recommended for ages 12+. FREE.

Pre-registration is required. Click here to sign up!

Full details at:


water dropsGroundwater 101

Date: Saturday, November 14th

Time: 9:00 AM -1:00 PM (Optional groundwater facility tour from 1-1:30 PM)

Join the Portland Water Bureau and the Columbia Slough Watershed Council for Groundwater 101 – a FREE educational workshop that teaches groundwater basics including local geology and hydrology, what role groundwater plays in our drinking water system, and what we can do to protect this important resource. This interactive workshop is presented with a mix of hands-on and classroom-style teaching and is appropriate for adults and high school students aged 14 and up. Light refreshments will be provided.

Pre-registration is required. Click here to sign up!

Full details at:

Photo credit: Columbia Slough Watershed Council


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