Lake Sammamish SUP

Lake Sammamish is the Eastside alternative to Lake Washington — quieter on weekdays, cleaner water, and a more natural shoreline on the east and north ends. The lake is about 7.5 miles long and lies between Issaquah to the south and Redmond to the north, with the Sammamish River draining out of the north end.

The Main Launch — Lake Sammamish State Park

The primary public access point for Lake Sammamish. The state park has a paved boat ramp and a large beach area — useful for both ramp-launched boards and carry-in access.

Address: 2000 NW Sammamish Rd, Issaquah, WA 98027

📍 Get Directions on Google Maps

Parking: Large lot in the park — Washington State Discover Pass required (day pass or annual). The lot rarely fills except during peak summer weekends when the beach draws swimmers and picnickers.

On the Water

The south end of the lake — near the state park — has the most motorboat traffic. Heading north, the lake quietens significantly, especially on weekday mornings. The east shore is mostly natural (state park land and undeveloped hillside) compared to the west shore which is residential.

The north end connects to Marymoor Park in Redmond via a short paddle into the lake’s inlet area. This transition from open lake to the Sammamish River slough is one of the better wildlife-watching paddles on the Eastside — herons, osprey, and beavers are all common.

Practical Notes

• Discover Pass: Required for state park vehicle access — buy online at discoverpass.wa.gov or at the park entrance
• Water quality: Generally cleaner than Lake Washington due to less urban runoff. Swim advisories in late summer — check Washington DOH notices
• Best for: Intermediate paddlers wanting longer routes, beginners who want more space than Green Lake, anyone exploring the Eastside lakes
• Route idea: Paddle north 7 miles to Marymoor Park — a full morning or afternoon commitment with shuttle logistics, or an out-and-back for committed paddlers