Discovery Bay is a coastal saltwater cove on the Puget Sound in Washington state, offering year-round sea kayaking. The primary public launch points are Maynard Beach on the east shore and the Gardiner Boat Ramp on the west shore. Maynard Beach has roadside parking near an old metal gate, while Gardiner provides a boat ramp and a portable toilet. The nearest permanent restrooms for both are at a convenience store along US-101 at the head of the bay. A Discover Pass is required for parking at these state-managed sites. Paddling the upper reaches of the bay requires a minimum tide level of four feet to ensure sufficient water depth. Tidal currents are a significant factor; planning to paddle with an ebb tide can provide a helpful push, especially when combined with a southerly breeze. The bay is exposed to wind, and conditions can change rapidly, making an assessment of weather and forecasts essential.

Several defined routes cater to different skill levels. A Sea Kayak II trip from Maynard Beach to Contractors Point and back is an 8.0-nautical-mile round trip along the west shore, passing Mill Point and Kalset Point. More advanced paddlers can attempt a 15-nautical-mile Sea Kayak III loop from Gardiner, circumnavigating the bay to visit the Discovery Bay Wildlife Area and Beckett Point. Another 8.0-nautical-mile Sea Kayak III route explores the north end from Gardiner to Diamond Point, Cape George, and Beckett Point, with Glass Beach noted as a potential lunch spot north of Cape George. There are no services or public access points along these shorelines beyond the launches. The area is part of the Snow Creek-Salmon Creek Wildlife Area, and paddlers may observe marine wildlife. The scenery includes forested points and secluded beaches. Motorized boat traffic is present but generally less intense than on more open parts of the Sound, though paddlers should remain vigilant, especially when crossing the bay.