Beaver Lake Triathlon

AUG
29
2027
Experience a multisport event in Sammamish featuring a lake swim, a scenic bike ride past Mount Si, and a flat run through forested trails.
Sun 29 Aug 2027
BLT Aquathon 1/4 swim, 13... 0.25 13.4 mi BLT Aquabike 1/4S, 13.4B 0.25 13.4 mi BLT Duathlon 13.4B, 4.3R 13.4 4.3 mi Full Triathlon1/4S 13.4B... 0.25 13.4 4.3 mi Relay BLT - 1/4S, 13.4B,... 0.25 13.4 4.3 mi

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Event Overview

The Beaver Lake Triathlon takes place in Sammamish, Washington, starting at the Beaver Lake Pavilion. The event features multiple disciplines and registration options, including a full triathlon, duathlon, aquathon, and aquabike. Participants can also enter as part of a relay team or a corporate team. All competitors must hold a USAT membership, with one-day bronze memberships available during the registration process.

Course Details

The full triathlon consists of three distinct segments:

  • 0.25 mile swim in Beaver Lake.
  • 13.4 mile to 13.7 mile hilly road bike course including Duthie Hill with views of Mount Si.
  • 4.3 mile flat run around the local neighborhood and Beaver Lake.

The final half mile of the run course passes through forest terrain. The bike leg follows a lollipop-style route, heading out to Duthie Hill and back.

Participant Information

Registered athletes receive a long-sleeve dry-release race T-shirt and a finisher medal. The registration package also includes entry to a pre-race pasta feed held at Redmond Town Center. Results from the event are officially posted on the USAT website. A cash bonus is available for participants who break the established course record of 1:14:12.

Event Schedule and Amenities

A pre-race safety briefing is conducted via live stream prior to the event. The day before the race, a pasta feed is hosted at a venue accessible by the Link Light Rail with parking available on-site. On the morning of the event, participants check in and rack their bicycles at the transition area before the start. Podium photos are taken for the top three male and female finishers. Visit the organization's website for the most recent information.

13 mi
Blt Aquathon (1/4 Swim, 13.4r)
4 mi
Relay Blt (1/4s, 13.4b, 4.3r)
Blt Aquabike (1/4s, 13.4b)
Blt Duathlon (13.4b, 4.3r)
Full Triathlon (1/4s 13.4b 4.3r)
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