Black Diamond Triathlon
Always double-check with the organizer's website! This page may contain affiliate links.
Black Diamond Triathlon
Black Diamond Triathlon is the RTB series opener held at Nolte State Park near Enumclaw, WA. The swim takes place in Deep Lake and the bike and run courses pass through Ravensdale, Selleck, and the farmlands around Enumclaw. Courses feature rolling terrain and changes in elevation.
The event offers multiple race formats and relay options:
- Olympic Triathlon: 1.5k swim, 40k bike, 10k run
- Sprint Triathlon: 0.5 mile swim, 13.7 mile bike, 2.8 mile run
- Super Sprint: 0.25 mile swim, 13.7 mile bike, 2.8 mile run
- AquaBike: 1.5k swim, 40k bike
- Olympic Relay and Sprint Relay with equivalent distances
All finishers receive a commemorative medal. Participants receive the official 2026 race T-shirt when registered by June 12 to guarantee shirt availability, and a hot post-race meal is provided. Top finishers receive custom pint glasses.
Packet pickup is available before race day at Cedar River Yoga in Renton on Wednesday, June 24, and at Nolte State Park on Friday, June 26 during race setup. Race morning pickup is available as a last resort.
The Black Diamond Triathlon is part of a three-race RTB series that culminates in a Trident award for athletes who complete all three stages: Black Diamond, Lake Meridian, and Bonney Lake. Visit the organization's website for the most recent information.
