[1] Bel Marin Keys is a waterfront community located east of the city of Novato.

All of the lagoons have access to San Pablo Bay through the navigational locks.

Phase 5 would have roughly doubled the size of Bel Marin Keys had it been built.

In March 2024, residents voted to approve a $30 million parcel tax; the money will build stronger and taller levees, plus an improved set of locks to keep adjacent waters from spilling into the lagoons adjacent to residences.

Federally, Bel Marin Keys is in California's 2nd congressional district, represented by Democrat Jared Huffman.