Lake Sammamish State Park

A 531-acre state park eight miles east of Seattle with 1.5 miles of flat, gently winding trails. The lake is seven miles long, 1.5 miles wide, and has two beach from whcih sea kayaks may be launched. You might spot salmon in the creek or great blue herons, which nest in the park.

about the park & lake

This park offers many opportunities for day-time recreation: two lakefront beaches for swimmers, kayakers, and stand-up paddlers; picnic and day-use facilities; watercraft launch areas; an ADA-compliant hiking trail; a playground; and baseball/softball fields. There is no camping at this park.

The lake is 7 miles long and 1.5 mi wide, and has a maximum depth of 105 feet.

Information for Leaders


  • If you are scheduling this as a non-course related activity, please limit your group size to the recommended party size. The maximum party size is for use by course field trips only, and includes both students and instructors. Group size maximums do not reflect how course field trips are run (in smaller groups of students and instructors), but allow for course leaders to register the course in our system.
  • If you are scheduling a course field trip with more than 50 total people (including both participants and leaders/instructors), please contact staff at so we can reach out to State Parks staff to notify them (at least a few weeks ahead of your field trip).


  • The Mountaineers has a commercial use permit with Washington State Parks for all free and fee-based outings at state parks. Leaders should carry a print or digital copy of our  commercial use permit to show rangers they may encounter.
  • Length: 9.0 nm

Upcoming Activities

There are no activities scheduled at this location.

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  • Lake Sammamish

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