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Registration opens
April 19, 2022 1:00 AM
Registration is open until
May 20, 2022
Register Now!
Saturday, May 28, 2022
November 20, 2021
from 5:15 on race morning

We are excited to announce we've handed the reins for the Lake Sonoma 100k over to The Healdsburg Running crew. Please visit https://ultrasignup.com/register.aspx?did=98833

View the 2022 Athlete Guide
Saturday, May 28, 2022
November 20, 2021
from 5:15 on race morning

Download the 2021 Athlete Guide Here.

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We make sure to provide safe and effective racing protocols ensure your health and safety.
Download our Covid-19 Guidelines

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