Greater Seattle & South Sound Triathlon Events

Greater Seattle is the PNW's densest triathlon corridor — King County alone hosts more races than most states. The Seafair Triathlon at Seward Park is the centerpiece, drawing the largest regional field each summer. East of the city, Rattlesnake Lake, Beaver Lake, and Pine Lake fill the August calendar. The Husky Indoor Triathlon keeps the season alive through winter. Snohomish County adds Monroe's Lake Tye to the north, and Pierce County rounds out the south with a handful of spring races. If you're within 30 miles of Seattle, you're never far from a transition mat.