Overview
Lake Sammamish State Park sits at the southern tip of Lake Sammamish, roughly 15 miles east of Seattle in the city of Issaquah, King County. It is one of the most visited state parks in Washington, drawing families, paddlers, swimmers, and trail users who want accessible outdoor recreation without venturing far from the urban core.
The park covers several hundred acres and offers two sandy swimming beaches, open lawns for picnicking, a boat launch, and connections to the Sammamish River Trail — a paved multi-use path that extends northward through Redmond and Woodinville. The lake itself is large, calm, and warm enough by midsummer for comfortable swimming.
Because of its proximity to Seattle, Bellevue, and Issaquah, the park can become genuinely crowded on warm summer weekends. Arriving early — ideally before 10 a.m. — is the most reliable way to secure parking and a good spot on the beach. Weekdays in July and August are noticeably quieter.
Before You Go
Discover Pass
Entry to Lake Sammamish State Park requires a Washington State Discover Pass for vehicles parked on state lands. Day passes and annual passes can be purchased online through the Washington State Parks website, at self-pay stations in the park, or at many sporting-goods and outdoor retailers nearby. Verify current pricing on the official Washington State Parks site before your visit.
Reservations
Picknic shelters and some group facilities can be reserved in advance through the Washington State Parks reservation system. During summer, shelters fill up weeks ahead; book early if you need a covered group area.
What to Bring
- Sunscreen and sun protection — the beaches offer limited shade
- Water shoes (the bottom near the shore can be rocky in spots)
- A picnic; no full-service food concession operates year-round (verify locally for seasonal vendors)
- Layers for morning visits, even in summer, as the Puget Sound lowlands can start cool
Pets
Dogs are permitted in the park but are not allowed on the designated swimming beaches. Keep pets on a leash at all times and check the current park rules on the official site, as policies can be updated.
Getting There
By Car
The park is located at the south end of Lake Sammamish, off East Lake Sammamish Parkway SE near Issaquah. From Seattle, take I-90 east to Exit 15 (Front Street/Issaquah), then follow signs toward the park. From Bellevue, East Lake Sammamish Parkway SE provides a direct lakeside route. Parking lots can fill completely by late morning on hot summer days — a Discover Pass is required to park.
By Transit
King County Metro serves Issaquah from Seattle and Bellevue. From Issaquah Transit Center, the park is reachable on foot or by bicycle via local streets and the Sammamish River Trail connection. Verify current route numbers and schedules at the King County Metro website, as service patterns change.
By Bicycle
The Sammamish River Trail connects to the park and makes cycling a practical option from Redmond, Marymoor Park, and points north. The trail is paved and suitable for most fitness levels.
Getting Around
The park is compact enough to navigate entirely on foot once you have parked. A network of paved paths links the parking areas, picnic lawns, and both main beach areas. Cyclists can ride through much of the park and continue north on the Sammamish River Trail without leaving pavement.
A boat launch ramp provides access to Lake Sammamish for trailered watercraft. Non-motorized boat rentals (kayaks, stand-up paddleboards) have been available seasonally near the park — verify with the park or local outfitters before your visit, as concession arrangements change year to year.
Things to See & Do
Swimming
Two designated swimming beaches are the park's main attraction from late June through Labor Day. Lifeguards are typically on duty during posted hours in summer — confirm schedules on the Washington State Parks site, as staffing can vary by season and funding.
Paddling and Boating
Lake Sammamish is large enough for kayaking, canoeing, and stand-up paddleboarding. The lake sees motorboat traffic on summer weekends, so paddlers should stay aware of wake and keep to the margins. The boat launch is open to trailered motorized and non-motorized craft (Discover Pass required).
Sammamish River Trail
The paved Sammamish River Trail begins near the park's north end and runs roughly 10 miles to Marymoor Park in Redmond, passing through suburban greenway, wetlands, and the Redmond watershed. It connects further to the Burke-Gilman Trail for cyclists heading into Seattle. The flat grade makes it accessible for most riders and walkers.
Picnicking and Open Lawn
Large grassy areas with picnic tables, grills, and shelter structures make the park popular for group gatherings and family outings. Reservable shelters are available; first-come spots fill quickly on summer weekends.
Birdwatching and Nature
The marshy areas along Issaquah Creek, which flows into the lake near the park, attract great blue herons, osprey, and various waterfowl. Salmon return to Issaquah Creek in autumn — the nearby Issaquah Salmon Hatchery (a short drive away) interprets this annual run.
Food & Drink
There is no full-service restaurant inside the park. Seasonal concession operations have existed at various times — verify locally before assuming food will be available. The park has drinking water and restroom facilities.
Issaquah's downtown, roughly 2 miles away, has a wide range of dining options including cafes, breweries, and casual restaurants suitable for a post-park meal. Gilman Village in Issaquah is a walkable shopping and dining cluster worth considering for a late-afternoon stop. Groceries and deli counters in Issaquah are convenient for assembling a picnic before you arrive.
Practical Information
Park Hours
Lake Sammamish State Park is open year-round, but day-use hours vary by season. Summer hours are generally longer than winter hours. Verify current hours on the Washington State Parks official website before visiting.
Facilities
Restrooms, outdoor showers (near the beach, seasonal), picnic tables, grills, and a playground are available. The park is largely accessible for visitors with mobility considerations — paved paths reach the main beach areas — but confirm specific accessibility features with Washington State Parks.
Emergency Services
Call 911 for emergencies. The park is served by Issaquah and King County emergency services. Cell coverage is generally reliable throughout the park given its urban location.
Leave No Trace
The park sees heavy use; pack out all trash, use designated fire grates only, and avoid feeding wildlife. Glass containers are prohibited on the beach areas.
Safety
Swimming safety is the primary concern during summer. Lifeguards typically cover the designated beach areas during posted hours, but swimmers should not assume coverage outside those hours or zones. Children should be supervised closely at all times near the water.
Boat traffic on the lake increases significantly on summer weekends. Swimmers and paddlers should remain within marked swimming areas and use visible safety equipment when paddling in open water.
The park's urban location means it is generally safe, but as with any popular public park, keep valuables out of sight in parked vehicles. Vehicle break-ins occur occasionally in Washington state park lots — leave nothing visible in your car.
