Swim Across America - Seattle Open Water Swim
September 12, 2026
Lake Sammamish State Park Sunset Beach · Issaquah, United States
About
An open water charity swim at Lake Sammamish State Park Sunset Beach benefiting the Fred Hutch Cancer Center, featuring a rolling swim start with distance options of .5, 1, and 2 miles, plus a virtual SAA My Way option.
Pick your distance
Everything below adapts to your choice
Start
Lake Sammamish State Park Sunset Beach
Start time
8:00 am
Entry fee
$500 fundraising minimum (adults); $250 (under 18)
Weather
Cloudy 18°C
Pack this
- Wetsuit plus anti-chafe balm for neck and underarms
- Two swim caps and anti-fog goggles, plus a tinted spare pair
- Towel, warm layers and dry shoes for the 18C post-swim chill
- Flip-flops, water bottle and a banana or gel for after the swim
- Photo ID and fundraising confirmation for check-in
What you should know
- Lake Sammamish in September usually sits near 18-20C, so a wetsuit is strongly recommended for the longer swims.
- Check in early at Sunset Beach for body marking, cap issue and the pre-race safety briefing.
- Stay on the marked buoy course; roll onto your back and raise an arm to signal a kayak if you need help.
- Sighting is harder under cloud and glare, so breathe to both sides and look up every few strokes.
- Post-swim chilling is the main risk: dry off and add layers right away instead of standing around wet.
Based on 1 source
The information shown here is based on the most recent listing we could find, and may change. Always confirm details on the event's official site before registering.