Tomales Bay is a 15-mile long, 6,780-acre tidal water body located in Marin County, California, within Point Reyes National Seashore. It is the largest unspoiled coastal embayment on the California coast, characterized by a long, narrow shape that is largely bounded on the west by the national seashore. The bay is a tidal feature, and its conditions are heavily influenced by its proximity to the Pacific Ocean. Several public launch sites provide access. On the east side, Miller County Park, also known as Nick's Cove, offers a cement boat launch, a pier, and restrooms for a fee. Also on the east side, Millerton Point within Tomales Bay State Park requires carrying boats about 100 yards on a trail; it is very shallow and best used at high tides. On the west side, Hearts Desire Beach in Tomales Bay State Park requires a similar carry across sand, with day-use fees and a designated boat landing area south of swimming floats. Other noted west-side launch points include Chicken Ranch Beach and White House Pool Park, which are quieter access points. Tomales Bay Resort on the west side has a marina. At the northern mouth of the bay near Dillon Beach, Lawson's Landing offers a boat launch. Wind is a major factor for paddlers, with conditions generally more benign from August through November, while June and July are known for high winds. Winter features less wind but also brings the herring spawn and increased wildlife activity. The water temperature ranges from approximately 52 to 60 degrees Fahrenheit year-round, necessitating appropriate thermal protection. Currents are stronger near the mouth of the bay, and the narrow area near Lawson's Landing/Dillon Beach can have real strong currents, with breaking waves on the bar just outside. Paddlers have been swept out into the ocean here. The bay is known for significant and sometimes dangerous wind events that can arise quickly. The area supports a rich array of wildlife, including seals, sea birds, and sea otters. Seasonal bioluminescence tours are popular. Boat-in camping is permitted on designated beaches along the west side of the bay north of Tomales Bay State Park, with pit toilets at some sites; permits are required. Pelican Point, Duck Island, and the east side of Hog Island are closed year-round to protect birds. Motorized vessels are prohibited within 100 feet of swim area markers at Hearts Desire Beach.