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Next Meeting – A community meeting has been scheduled for Tuesday, June 16th, 2026 at 6:30pm – Topics include lake issues (algae blooms, invasive weeds, lake level, etc.), upcoming treatment plans, fundraising, and board elections.

State of the Lake: Friends of Cottage Lake is working with AquaTechnex to treat the lake to remove phosphorus from the water to reduce harmful blue-green algae blooms. The most recent treatment was completed on May 7th, 2026

Eurasian Milfoil – last treated in 2022 – in 2026, we are seeing a lot of milfoil in the lake and need to discuss future treatment options

Water Lilies – last treated in 2017 – we are watching the remaining lilies – no treatment currently planned.
See the water lily page for more info.

Fish Stocking information for 2026:
Cottage Lake Fish Stocking (including information on the fishing derby in 2026)

Join Friends of Cottage Lake on Facebook:
Click here to apply to join the private group or check out our public page here: https://www.facebook.com/FOCL.Woodinville​ ​

Who we are:

Friends of Cottage Lake (FOCL) is a non-profit, community-based group committed to improving and defending the health and continued enjoyment of Cottage Lake in Woodinville, WA.

We are currently working with King County to apply for grant money to help fund various lake improvement projects. In the summer of 2005, our lake was chosen as a recipient of a Centennial Clean Water Fund grant—this grant targets the phosphorus problem and funded water quality monitoring and community outreach programs for 5 years.

FOCL is also working with the community to deal with the water lily problem and the Eurasian Milfoil infestation on Cottage Lake. See the links for more information.