Grit City Backyard Ultra
About this race
Fifteen hours. Hourly loops through downtown Tacoma. See how far you get.
The Grit City Backyard Ultra is Tacoma’s take on the backyard ultra format: a 3.3-mile loop through downtown Tacoma— featuring the Bridge of Glass, the Glass Museum, the Tacoma Dome, and generally gorgeous city views— repeated every hour on the hour for up to 15 hours. Show up to the corral in time for the next lap, or take an honorable DNF! Complete all 15 laps — 45.5 miles total — and you’re a finisher!
Don’t let the big numbers discourage you— finishing the race is not an expected goal for most participants— but having fun is! This race is about the hours in between: watching the course empty out lap by lap, grabbing a grilled cheese between loops, and seeing who’s still moving as the day wears on. Bring a crew if you can— someone at the corral to hand you food, fresh socks, and a reason to keep going will make the day all the merrier!
Pick your distance
Trail running
GCBYU 2027
Typical race-day weather
Based on 4 years of Open-Meteo archive data for this event's race dates in Tacoma, plus the 3 days either side.
The sun rises at 7:11 AM and sets at 6:45 PM local time (PDT) in Tacoma on October 3, 2027 — 11h 34m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 36 Tacoma events
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