At Play on the Bay (If You Go...)

Robert Gray Charters

(888) 316-9378

(415) 235-7878

www.robertgraycharters.com

Day and overnight maritime history tours, gourmet food tours and Alaska Inside Passage cruises on a 120-ft tugboat.

The Hawaiian Chieftain

331-3214

www.hawaiianchieftain.com

Sunset sails, Sunday brunch sails, and Saturday adventure sails, in addition to educational programs for kids and battle reenactments.

Rendezvous Charters

543-7333

www.baysail.com

Ticketed public cruises include Sunday Brunch, Sunset Cruises, and a Saturday afternoon sail on two tall ships -- the square-rigged Brigantine Rendezvousor the Bay Lady.

Come Sailing

(877) BAY-SAIL

www.comesailing.com

Sail and motor yacht cruises, event planning. The Web site is a great resource for public sail information and a variety of boats to charter.

Sea Trek

488-1000

www.seatrekkayak.com

Instruction, half-day and full-day rentals, and overnight kayaking trips. Regularly scheduled tours include a Starlight Paddle and Angel Island Adventure. Custom adventures available.

San Francisco Hang Gliding Center

528-2300

www.sfhanggliding.com

Tandem aquagliding lessons that take off from and land on the bay. Hang gliding and paragliding instruction also available.

Compass Rose Yacht Charters

(510) 523-9500

www.compassrosecharters.com

Luxury dining cruises aboard two elegant motor yachts, Camelotand Voyager.