Lake Sammamish, Washington, USA

Welcome to the ultimate guide to Lake Sammamish — things to do, where to stay, fun facts, history, stats and more. Let’s dive in!

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All About Lake Sammamish

At just under 5,000 acres, Lake Sammamish is one of the major recreational lakes in the state. The lake provides activities for fishermen, boaters, jet skiers, water skiers, swimmers, picnickers, and those just wanting to enjoy the scenery. Lake Sammamish is less than a 30 minute drive from Seattle, making it a convenient day trip for visitors and residents of the area alike. More than a million people in the region visit Lake Sammamish every year.

Lake Sammamish (pronounced “suh-MAM-ish”) is a freshwater lake, seven miles long and one and half miles wide, formed by glacial activity. It is bordered by various parks including Marymoor Park at the lake’s north end and Lake Sammamish State Park at its south end. Issaquah Creek feeds the lake, which then drains into Lake Washington via the Sammamish River. The East Lake Sammamish Trail runs the length of the lake (and then some) and connects to a 40 mile trail system that runs from Issaquah to the east, north to Redmond, Kenmore and Bothell, then south along the Burke-Gilman Trail to Ballard Locks at Puget Sound. With the impressive trail system as well as various state and county parks along the shore, visitors have plenty to do and see whether they want to stay for just the day or make it an extended visit complete with overnight camping.

Lake Sammamish provides habitat for a variety of coldwater fish including kokanee salmon, coho salmon, and chinook salmon, as well as birds and other wildlife. The Washington Department of Fish and Wildlife’s Issaquah Salmon Hatchery is located along Issaquah Creek, a relatively short distance upstream of Lake Sammamish. Other coldwater and warmwater species in the lake include largemouth bass, rainbow trout, walleye, perch, steelhead trout, and cutthroat trout. Smallmouth bass are prevalent in Lake Sammamish and are often seen at near state record size. Bird watching is very popular around the lake with species such as the bald eagle, great blue heron, various sparrow species, and orange-crowned warbler.

The water quality of Lake Sammamish has long been a concern for local activists. In 1968, sewage was diverted from Lake Sammamish, which reduced phosphorus inputs by about 35 percent. Phosphorus concentrations gradually increased again between 1978 to 1996, due to urbanization throughout the watershed. In 1995, a citizen’s task force, Partners for a Clean Lake Sammamish, worked to identify issues and implement a water quality management plan. Working with other state and county entities, much attention has been brought to the issues and steps taken to improve water quality. More protection has come from the fact that the lake has received “natural resource of statewide significance” designation by the Shoreline Management Act. The act is based on the philosophy that the shorelines of the state of Washington are among the most valuable and fragile of its natural resources. Therefore, shores with this designation are more closely monitored with respect to their utilization, protection, restoration and preservation.

Another issue for Lake Sammamish has been water levels. Historically, the water levels of Lake Sammamish fluctuated greatly. In the early 1960’s the Army Corps of Engineers completed a channel dredging and straightening project that included construction of a weir at the lake’s outlet. The result was the virtual elimination of flooding in the Sammamish River valley and the reduction of maximum flood elevations and seasonal water surface elevations in the lake. Due to damage and deterioration of the original structure, the weir was rebuilt in 1998 with a slightly updated design, which also improved the passage of breeding salmon during low flow.

Lake Sammamish enjoys a rich history due in large part to its Native American settlers. The original lake name was Squak Lake, but the name evolved into Lake Sammamish. The word “Sammamish” comes from a Native American word “Samena,” meaning “hunter.” For centuries, the Lake Sammamish area was an important culture zone and gathering place for local Native American tribes. Tribes celebrated their winter festivals at the south end of the lake, where they hunted, fished and gathered berries in preparation for winter. In more recent times, the Lake Sammamish area has seen some of the most rapid growth in the Greater Seattle Metropolitan Area due to the strong local economy which includes the presence of companies such as Microsoft, Nintendo and many other high-tech businesses.

Lake Sammamish has many accommodation options ranging from resorts and bed and breakfasts to cabins and other vacation properties along the shores. For those looking to relocate to the Seattle area, the lake is conveniently located and still has waterfront lots to build on and as well as condos and homes for sale. The area has exploded in recent years including the Seattle suburbs of Redmond, Snoqualmie, Fall City, Issaquah and Bellevue, which are located nearby. Just two miles away is the city of Sammamish which was incorporated in 1999. A Shoreline Master Plan and heavy community involvement will ensure that Lake Sammamish remains a valuable resource for visitors and residents alike.

Things to Do at Lake Sammamish

  • Vacation Rentals
  • Fishing
  • Swimming
  • Jet Skiing
  • Water Skiing
  • Camping
  • Cabin Rentals
  • Hiking
  • Hunting
  • Wildlife Viewing
  • Birding
  • State Park

Fish Species Found at Lake Sammamish

  • Bass
  • Black Bass
  • Chinook Salmon
  • Coho Salmon
  • Cutthroat Trout
  • Kokanee Salmon
  • Largemouth Bass
  • Perch
  • Rainbow Trout
  • Salmon
  • Smallmouth Bass
  • Steelhead Trout
  • Trout
  • Walleye

Find Places to Stay at Lake Sammamish

If you’re considering a Lake Sammamish lake house rental or hotel, we’ve made it super easy to find the best rates and compare vacation accommodations at a glance. Save time using this interactive map below.

Recommended Sites to Book a Lake Sammamish Vacation

If you want to take a deeper dive to find waterfront lake cabins, cottages, condos, hotels or resorts, check out our favorite Lake Sammamish lodging partners.

  • VRBO – Use VRBO to find the perfect lake rental home, condo, cabin, cottage or other vacation property.
  • – One of the world’s leading digital travel companies, connects travelers to everything from cozy B&Bs to luxury resorts.
  • Expedia – Expedia is a popular online travel agency with more than 140,000 lodging properties worldwide.
  • – With more than 325,000 hotels in 19,000-plus locations, is an industry leader in online accommodations.
  • TripAdvisor – Read traveler reviews and compare prices on hotels, vacation rentals and more at TripAdvisor.
  • Trivago – Trivago helps travelers compare deals for hotels and other accommodations from a variety of booking sites.
  • KAYAK – KAYAK scours hundreds of other travel websites at once to find the best deals on hotels and other travel-related services.
  • RVshare –RVshare connects travelers interested in renting a motorhome with owners who have RVs to rent.
  • CampSpot – Campspot offers premier RV resorts, family campgrounds, cabins and glamping options across North America.

Note: These are affiliate links so we may earn a small commission if you book through them. While there is no extra cost to you, it helps provide resources to keep our site running (thank you)! You can read our full disclosure policy here.

Lake Sammamish Statistics & Helpful Links


Lake Type: Natural Freshwater Lake, Dammed

Surface Area: 4,897 acres

Shoreline Length: 18 miles

Normal Elevation (Full Pond): 30 feet

Average Depth: 58 feet

Maximum Depth: 105 feet

Water Volume: 283,860 acre-feet

Drainage Area: 100 sq. miles

Trophic State: Mesotrophic

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