Use this calendar for planning purposes only.
Event details subject to change!
Pre-registration is strongly recommended! During COVID, most event organizers do not have on-site registration. You are responsible for following event organizers' COVID procedures.
To confirm event status (sold out, cancellations, schedule changes, COVID restrictions, etc.), visit the event website link below.

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Tenacious Ten 10K | 10Mi
April 9 @ 6:30 am - 11:30 am PDT
An event every year that begins at 6:30 am on day second of April, repeating until April 12, 2025
The Tenacious Ten features both 10 mile and 10K distances for all levels of runners. You may be asking, “what makes this course tenacious?” And the answer is – it’s who we are – and it’s who you are too! It’s you, the person reading this that will be tenacious come race day. And it’s you who will defy gravity and push back against the universe.
Whether you’re eager to run the rare 10 mile distance, or set a new PR on a flat, fast course, we’re here to help. We hope you’ll join us. Let’s get tenacious!
SCHEDULE
The schedule may change at anytime due to unforeseen circumstances or to meet City Of Seattle requirements so please make sure to fully read through all pre-race participant e-mails to be updated on the event schedule.
6:30 am – Event Site Opens
7:00 am – Music Begins on Main Stage
7:30 am – Mandatory Announcements
7:40 am – Pre-Race Warm Up at Main Stage
7:45 am – Runners will make their way to the corals
8:00 am – All Participants Start
9:30 am – 10K Awards
10:00 am – 10 Mile Awards
10:30 am – Kids 1K Run Starts
10:30 am – Course Closes
11:30 am – Event Break-Down Begins
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To confirm event status (sold out, cancellations, COVID restrictions, etc.), be sure to visit the event website above.
Pre-registration is strongly recommended! During COVID, most event organizers do not have on-site registration. You are responsible for following event organizers' COVID procedures.
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