Lake Wilderness Triathlon and Run
Updated
Saturday, June 5, 2027, first start 7:00 AM, in Maple Valley (Lake Wilderness Park). Distances: 5.5K, 10K. Entry from $55 to $70; the 10K goes from $70 to $75 after April 26.
- Date
- Saturday, June 5, 2027
- Start time
- 7:00 AM (earliest wave)
- Location
- Lake Wilderness Park, Maple Valley, WA 98038
- Area
- Eastside & South King, Seattle
- Distances
- 5.5K10K
- Course
- Trail (dirt or single-track on at least part of the course)
- Price
- $55 to $70 plus the platform's processing fee
- Next price increase
- Monday, April 26, 2027: 10K $70 → $75
- Registration
- Open. Opened October 1, online signup closes Saturday, June 5, 2027
How to register
Registration is on RunSignup. Pick your distance, add any extras, and you'll get a confirmation email with your bib details. Sign up by April 26 to pay $70 instead of $75.
Register on RunSignup →Race website
Course and race notes
Lake Wilderness Triathlon is celebrating our 22nd year!! This event is scenic in all aspects of the race and has something for every level of participation. This is an excellent venue for a first time triathlete and the triathlete that's looking for some great competition.
From the race's own listing. Check the race website for the course map and parking.
Source: RunSignup public race API, refreshed 2026-10-17. Details can change; the registration page is the final word.