Tahuya River

Alderbrook Resort & Spa, aka Alderbrook Inn or Alderbrook, is a hotel located in Union, WA on the southern shores of Hood Canal. Approximately two hours west of Seattle, Alderbrook has views of nearby Olympic National Park and Mount Washington. Alderbrook opened in 1920 as a group of tent cabins with wood stoves and has been expanded and remodeled numerous times. Today the hotel has 77 guest rooms and little more like 16 cottages, as well as a restaurant, meeting rooms, saltwater pool, spa, two marinas, and two retail spaces.

Union or Union City is a small census-designated place in Mason County, Washington, United States. The community lies along the southern shore of the Great Bend of the Hood Canal, near the mouth of the Skokomish River, which flows from the nearby Olympic Mountains. The U.S. Census reported a population of 631 inhabitants in the 2010 census. The ZIP Code for Union is 98592. State Route 106 is the main route through Union, leading to Belfair farther north, and Potlatch and US Highway 101 to the south.

The Skokomish River (Twana: squʔquʔ) is a river in Mason County, Washington, United States. It is the largest river flowing into Hood Canal, a western arm of Puget Sound. From its source at the confluence of the North and South Forks the main stem Skokomish River is approximately 9 miles (14 km) long. The longer South Fork Skokomish River is 40 miles (64 km), making the length of the whole river via its longest tributary about 49 miles (79 km). The North Fork Skokomish River is approximately 34 miles (55 km) long. A significant part of the Skokomish River's watershed is within Olympic National Forest and Olympic National Park.

During the Vashon Glaciation a series of lakes formed along the southern margin of the Cordilleran Ice Cap. In the Hood Canal depression, two significant lake stages existed, Lake Skokomish and Lake Hood. Early Lake Skokomish’s surface was at 350 ft (110 m) above sea level, draining across the divide at Shelton, Washington into early Glacial Lake Russell. As the glacier receded northward, this freshwater lake grew in size, until the ice was north of the Clifton channel. With the opening of the Clifton channel, the water dropped to 160 m (520 ft) above sea level. This longer and lower level lake is referred to as Lake Hood. The glacier continued to recede northward until it reached the Poulsbo channel. Here, the water level equalized to Glacial Lake Russell no longer having a separate identify.

Twanoh State Park is a public recreation area located 16 miles (26 km) southwest of Belfair on the east side of Hood Canal in Mason County, Washington. The state park's 188 acres (76 ha) include 3,167 feet (965 m) of saltwater shoreline and 2.5 miles (4.0 km) of inland hiking trails. The park is managed by the Washington State Parks and Recreation Commission.

Amelia is a ghost town in Mason County, in the U.S. state of Washington.A post office called Amelia was established in 1895, and remained in operation until 1901. Amelia Edmonds, an early postmaster, gave the community her name.

Schumacher Creek, formerly Shumocher Creek, is a creek in Mason County in the U.S. state of Washington. It flows into Mason Lake on the traditional territory of the Squaxin Island Tribe. Schumacher Creek is part of the Sherwood Creek watershed, and contains Trask Lake and Carson Lake.

The Dewatto River is a stream in the U.S. state of Washington. It originates in western Kitsap Peninsula and flows south, emptying into Hood Canal. The name "Dewatto" comes from the Twana placename [duʔwátaxʷ], which implies the presence of spirits causing mental derangement near the stream's mouth.

Sund Rock is a designated conservation area on the U.S. state of Washington's Hood Canal. The area is known for abundant and diverse life, including but not limited to Lingcod, Giant Pacific Octopus, Wolf Eel, as well as nudibranch, anemone, and sea cucumber. The area is well known to regional scuba divers, especially for its two major walls, known colloquially as the north and south walls. These walls have depths 70 to 80 feet (21 to 24 m), depending upon the tide. Several other walls exist, some going down beyond 100 feet (30 m) in depth. One of these is called "fish pen wall." Additional features include the "fish bowl"—a reef-like area full of life—a large sunken boat just to the north of the north wall, and a small wrecked boat between the north and south walls. Recreational and technical divers alike find Sund Rock attractive for various reasons. Recreational divers appreciate Sund Rock because it is not a current-sensitive area, the main walls are easily within recreational dive limits, and for abundant sea life. Technical divers enjoy the deeper walls and other areas that allow them to dive well beyond recreational limits. Because Sund Rock is a conservation area, no hunting or gathering of any kind is permitted. Two ways exist of entering the waters in the area. One option involves a somewhat steep but short hike and surface swim of 250 to 600 metres (820 to 1,970 ft). An alternative method is to access a private beach nearby. The boundaries of the area are

Octopus Hole Conservation Area is defined as those waters, tidelands, and bedlands of Hood Canal within a line projected due east from the western shore of Hood Canal on latitude 47°27'01"N for 200 yards, thence southerly 628 yards parallel to the high watermark to latitude 47°26'40", thence due west to shore. Similar to the close-by Sund Rock conservation area, Octopus Hole is very popular with scuba divers who enjoy diving the walls associated with the site to view various underwater creatures, including lingcod, giant Pacific octopus, wolf eel, sea cucumber, and nudibranch. The area is well known to regional scuba divers, especially for its two major walls, known colloquially as the north and south walls. These walls have depths of 70 to 80 feet (21 to 24 m), depending upon the tide. Several other walls exist, some going down beyond 100 feet (30 m) in depth. One of these is called "fish pen wall." Additional features include the "fishbowl"—a reef-like area full of life—a large sunken boat just to the north of the north wall and a small wrecked boat between the north and south walls. An alternative method is to access a private beach nearby. Recreational and technical divers alike find Sund Rock attractive for various reasons. Recreational divers appreciate Sund Rock because it is not a current-sensitive area, the main walls are easily within recreational dive limits, and for abundant sea life. Technical divers enjoy the deeper walls and other areas that allow them to dive well beyond recreational limits. Because Octopus Hole is a conservation area, no hunting or gathering of any kind is permitted. Like most sites on the mid to southern Hood canal, this area is not currently sensitive. However, some noticeable current can occur. Such current is not strong enough to significantly affect dive plans or cause problems, but it is strong enough to slow or speed progress, depending upon the diver's direction.

Mason Lake is a natural elongated lake south of Belfair, Washington, United States in Mason County. Named for Charles H. Mason, the first secretary of Washington Territory, the lake is on the isthmus of the Kitsap Peninsula between the Hood Canal and Pickering Passage of the Case Inlet. The smaller Benson Lake is to its eastern side. Mason Lake is approximately 1000 acres in size and four miles long. Its maximum depth is 90 feet and the mean depth is 48 feet. With 10.9 miles of shoreline, the lake sits at 194 feet above sea level. More than a thousand residents live yearlong around the shores of Mason Lake, the second largest freshwater lake in Mason County, second to the man-made Lake Cushman to its northwest. Originally a summer vacation community, the lake has always been known for its power boats, jet skis and water skiing. A county park provides picnic and boat launching access. Swimming is limited to private access parks and residences. The single lane boat launch is on the steeper side and winches tend to get jammed if they're in the locked or retrieval state. Mason Lake is also home to a large amount of wildlife; including bald eagles, ringed-necked pheasants, and robins. It has a variety of ducks also; including mallards, diving ducks, canvasbacks, and ruddy ducks. Otters, divers, killdeer, and great blue herons also inhabit Mason Lake. Fish include; Rainbow trout, largemouth bass, yellow perch, brown bullhead catfish, and northern pikeminnow. The community of Mason Lake is located centrally between Grapeview and Harstine Island to the east, and Twanoh State Park to the west. Much of the area surrounding Mason Lake is commercial timberland in various states of harvest.

Potlatch State Park is a 57-acre (23 ha) Washington state park located on Hood Canal near the town of Potlatch in Mason County. The park offers camping, hiking, boating, fishing, shellfish harvesting, beachcombing, and sailboarding.