The Three Rivers Marathon Swim is an annual 30K open water swimming event (roughly 18.6 miles) along the Ohio, Monongahela, and Allegheny Rivers in Pittsburgh, PA, benefiting Team Forever and the Forever Fund to support families with infant cardiothoracic surgery costs at UPMC Children's Hospital.
Race Day
Aug 29, 2026
Registration opens, price changes, race updates: straight to your inbox.
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Make Race PlanAre you the race director for Three Rivers Marathon Swim?
Claim this race to manage registration, volunteers, and race-day ops on Endurance HQ.
