Clean out invasive species from Boutwell Creek in Lake Oswego

May 23 Work Party – Volunteer Now!

Join us in our first ever work party! In this party, we are clearing out invasive species in the riparian area along Boutwell Creek...
Doug Hawley, one of the 'Friends of Iron Mountain'


You can help protect watershed health! Volunteer to plant trees, sign up for our newsletter, host a presentation, or attend a free workshop. SCHEDULED...
Friends of Iron Mountain, clearing tree-choking ivy


The OLWC partners with the community on projects to improve the health and function of the Oswego Lake watershed. For examples of these projects,...
Lake Oswego Backyard Habitat Program Logo

Making Connections – The Lake Oswego Backyard Habitat Program

The City of Lake Oswego has over 300 acres in natural areas and neighboring Tryon Creek State Park adds another 770 acres. That adds...

What is the Oswego Lake Watershed Council? The Oswego Lake Watershed Council (OLWC) is a locally organized, non-profit, non-regulatory watershed stewardship organization established to improve the condition and health of the Oswego Lake watershed and its stream network.

'Watershed sounds'

Voice of the Pacific Chorus Frog played with the kind permission of Martyn Stewart,