Make a difference in the Thornton Creek Watershed.


New members are always welcome. The larger the group, the greater the voice for a healthier watershed!

To join right now download and use the form at this site or contact Membership Vice President Frank Backus at

Download our membership form here: I_would_like_to_join_TCA

Please complete the membership form and mail it with a check to:

Thornton Creek Alliance
P.O. Box 25690
Seattle, WA 98165-1190

Or, Join with PayPal

You can pay with a credit card, debit card or your PayPal account by completing the form below. If you do not already have a PayPal account, you will be asked to set one up in order to pay for your membership in this way.

Select Membership Level
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