Black Diamond Triathlon 2026

The 2026 RTB series season opener. Swim in Deep Lake, bike and run courses through Ravensdale, Selleck, and Enumclaw farmlands. Finishers receive a medal; top athletes earn custom pint glasses. Nolte State Park is spectator-friendly, suitable for families. This event starts your journey to earn The Trident, a trophy for consistency across three RTB races.