Hidden Harbor Marina is a private boating facility in the Sacramento River Delta located at the confluence of Cache and Steamboat Sloughs, located two miles north of Rio Vista.

• Hidden Harbor Marina’s philosophy is:  “don’t race, enjoy life at a slower pace.” Boaters at Hidden Harbor relax in a natural setting in our two off stream harbors.
• Hidden Harbor Marina is predominately sailboats, but we do offer berthing for powerboats, trawlers, and tugs.  Please see our vessel requirements at “Marina Information.”
• We have no covered slips, as we believe that covered slips would ruin the aesthetics of Hidden Harbor’s natural Delta setting.
• Harbor Depths: The “east harbor” has a 6 foot depth throughout at a 0.0 low tide. The “west harbor” varies from 7 feet to 5 feet at a 0.0 low tide.
• Hidden Harbor Marina and the surrounding waters have never had a water hyacinth infestation as seen in the south Delta.  The reason?  Constant fresh/cold water flows from upstream into Steamboat Slough and Cache Slough.  Our harbors are debris free during the winter high water flows.  Swinging boom gates allow us to close the harbor entrances, keeping logs and debris out.
• Rio Vista: Rio Vista is located just 2 miles from Hidden Harbor, via the Real McCoy II Ferry, which is operated by Cal Trans and operates 24 hours a day. Call Cal Trans ferry information line at 510-622-0122 for ferry operation updates.  Rio Vista has a full service boatyard, Sierra West Boat Works, which is located behind Delta Marina.  Lira’s Supermarket and Ace Hardware have an excellent variety of supplies, and several restaurants in town offer a fine choice of dining.