Lake Sammamish Beach

Lake Sammamish State Park is a 512-acre day-use park with 6,858-feet of waterfront on Lake Sammamish. The area around the lake was an important culture zone for local Native American tribes for centuries. The park provides deciduous forest and wetland vegetation for the enjoyment of visitors. A salmon-bearing creek and a great-blue-heron rookery are additional features.

Additional Information

- The park offers easy hiking trails, plus bicycling, and mountain biking through natural areas along paved and compacted dirt roads.
- Kayak rentals are available in the summer.
- There are sanded volleyball courts, but many people place volleyball nets anywhere on the beach.
- There are two bath houses with dressing rooms and two big toy children's play areas.
- There are two baseball fields.
- A recreational license is required for fishing and shellfish harvesting at Washington state parks. For regulations, fishing season information, or to purchase a recreational license, visit the Washington Department of Fish and Wildlife.

WATER QUALITY

Passed water quality tests at least 95% of the time
Historical Status
This status is based on the latest sample, taken on August 28th, 2018. Puget Soundkeeper Alliance updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at

For water quality icon legend, click:

CURRENT WEATHER

7°C

Clear

Report Pollution

MONITORING FREQUENCY

SOURCE INFORMATION

During the sampling period, Puget Soundkeeper Alliance regularly updates the Swim Guide to reflect the most current information.

Local health officials follow the Ten State Standard –a geometric mean of 200 fecal coliforms with no single sample exceeding 1000 – to determine whether a swimming beach is polluted. The unit of measure is a CFU which stands for Colony Forming Units.

A beach is marked Green (open) when a single sample is below 1000 CFU/100ml and the geometric mean of the five most recent samples is below 200 CFU/100ml.

A beach is marked Red (closed) when either a single sample exceeds 1000 CFU/100ml or a geometric mean of the five most recent samples exceed 200 CFU/100ml

A beach is marked Grey when current water quality data is not available.

If a sample is found to exceed the Ten State Standard three new samples are collected. If the average of these samples confirms the results from the routine sample, Public Health Seattle & King County is alerted and determines the health and safety implications of the bacteria and algal toxin data collected and works with King County and the local park manager to post an advisory.

For more information go to King County Swimming Beach Bacteria Monitoring website: http://green2.kingcounty.gov/swimbeach/

WATER QUALITY GRAPH