Brentwood Lake is a private lake nestled between the pines in Twain Harte, California that offers swimming, fishing and limited boating to more than 200 members and their guests.

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The lake is not open to the public.

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First established in the 1970s, Brentwood Lake Club, Inc. manages membership and maintains the lake. The non-profit corporation has a seven-person board made up of volunteers. Membership dues and fees are used exclusively for maintenance costs.