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Big Backyard 5K

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Founded in 2010, the Big Backyard 5K, also known as the BBY5K, is a community-run/walk
showcasing King County Parks regional trails. Proceeds from the BBY5K benefit King County Parks, supporting maintenance and operations of facilities and recreational resources. With your help over the years, we have raised more than $250,000!

The 2021 Big Backyard 5K Festival takes place on three Sundays in June showcasing three different regional trails in Your Big Backyard. Or you can join us virtually in your neighborhood, on the trail, or on a treadmill to support King County Parks!

June 6 – Marymoor Connector Trail, Marymoor Park, Redmond

June 13 – Snoqualmie Valley Trail, Tolt MacDonald Park, Carnation

June 20 – Green to Cedar River Trail, Lake Wilderness Park, Maple Valley

June 6 – June 20 – Virtual 5K presented by Kaiser Permanente (run/walk and submit your results anytime between 6/6-6/20)

Select a location, date, and your preferred START Time. Be aware that we offer START times beginning at 8:00 a.m. and we will fill earliest time slots first. Remember, space is limited at the LIVE Events with a maximum of 300 per day. Start times are staggered so we can maintain safe physical distancing, so grab your spot on the START Line NOW!

Presented by Kaiser Permanente 
We are thrilled to have Kaiser Permanente supporting the Virtual BBY 5K to provide more safe opportunities for participation. Run your 5K virtually from anywhere! You will be emailed a link to report your time when you sign up. Submit your results to us anytime between June 6 to 20.  Apps such as Strava, Garmin, MapMyRun, etc. are appreciated, but we will also take your word for it in support of King County Parks. 

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