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LakeQuality
Max depth
Not measured
Surface area
4,897 acres
Public access
Unknown
Water quality
Grade B
Best season
July–August
County
King County, Washington
Wakesurf suitability
Excellent

Depth unrated · Room Excellent · limited data

About the water

Several parks and launch points around the lake make access easy; relaxed, family atmosphere with designated swim/paddle areas. Lake Sammamish State Park access. Busy summer weekends.

Washington wake-sport rules

Washington has no statewide wakesurfing-specific law. Statewide rules require reducing to no-wake speed when approaching a person on a surfboard or others in the water and bar towed watersports one hour before sunrise to one hour after sunset, but wake-surf setbacks are addressed locally (e.g., advocacy and proposed restrictions on Lake Sammamish). Local variation in boating rules is authorized by waterbody.

Full Washington rules →

This rating classifies measured depth and surface area against published wake-sport guidance. It is not a safety clearance and not permission to ride: local no-wake zones, hours, and horsepower limits are set by the county, lake district, or land manager, and they take precedence. Lake measurements from Seattle Times - A Guide to Wakeboarding and Wakesurfing in Seattle.

Where to stay near Lake Sammamish

Top-rated places to stay near Lake Sammamish

See the full where-to-stay map for Lake Sammamish

Planning a trip to Lake Sammamish?

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Frequently Asked Questions

Lake Sammamish rates Excellent for wakesurf suitability. Deep and roomy enough to ride the way the sport’s own guidance recommends. The rating is based on its measured surface area of 4,897 acres. This is a read of the water's dimensions, not legal permission — check the Washington rules and the local authority for this lake before you launch.

No maximum-depth measurement is on record for Lake Sammamish in the state agency data we use, so its depth factor is unrated. We do not estimate depth.

Lake Sammamish carries a LakeQuality water-quality grade of B, computed from EPA and state monitoring data — Secchi clarity, total phosphorus, and chlorophyll-a. That is a separate question from wakesurf suitability: a lake can be excellent to ride and mediocre to swim in, or the reverse. See the full lake page for the grade breakdown.

Washington has no statewide wakesurfing-specific law. Statewide rules require reducing to no-wake speed when approaching a person on a surfboard or others in the water and bar towed watersports one hour before sunrise to one hour after sunset, but wake-surf setbacks are addressed locally (e.g., advocacy and proposed restrictions on Lake Sammamish). Local variation in boating rules is authorized by waterbody. Individual lakes often add stricter local limits on top of the statewide rule — no-wake zones, operating hours, and horsepower caps are all common — so confirm with the local authority for Lake Sammamish.

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