Big Backyard 5K/10K
About this race
The Big Backyard 5K & 10K is an annual fun run and family walk celebrating the numerous King County Parks throughout our neighborhoods, cities, and county.
Founded in 2010, proceeds from the BBY 5K benefit King County Parks, support maintenance within the parks and operations of the facilities and recreational resources to keep our parks operating and open year-round!
Since the event's inception in 2010, more than 13,000 participants have gathered to raise over $80,000 for King County Parks!
Join us at 9:00am on Sunday, June 7 at King County's Marymoor Park to have fun in YOUR BIG BACKYARD!
Pick your distance
Running
10K Run/Walk
5K Run/Walk
1K Kids Run
Typical race-day weather
Based on 4 years of historical conditions on this event's race dates in Redmond.
Course
Route map and elevation profile
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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Other races near Redmond
Different organizers, within 40 miles, in the next three months
Redmond Harvest Half Marathon
Hope and Heroes Run
Captain Jack's Treasure Run
Puesta del Sol Walkathon
🏃 Plan Your Next Race in Redmond
Find upcoming events by distance:
- Redmond 5K Races 9 races
- 10K Run Events in Redmond 3 races
- Redmond Half Marathons 3 races
- Redmond Running Calendar 2026 12 races
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, 12 Redmond events
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