8:00am - Sunday, June 5 - King County's Marymoor Park
Founded in 2010, the Big Backyard 5K, also known as the BBY5K, is a community run/walk
showcasing King County Parks.
Proceeds from the BBY5K benefit King County Parks, supporting maintenance and operations of facilities and recreational resources. Over our 12 years, more than 12,000 runners and walkers have gathered to raise over $75,000 for King County Parks. Thank You!
This year’s event is presented by Harborstone Credit Union and celebrates our ability to gather together again with a simple approach to fun and fitness.
Please join us on Sunday, June 5 to celebrate in Your Big Backyard.
The Big Backyard 5K always has great swag. Super Soft T-shirt! Harborstone Hoodie! Dog Bandanas!
BBY 5K HARBORSTONE HOODIE
SUPER-SOFT SHORT SLEEVE BBY T-SHIRT
Adult Unisex Sizes
Adult Unisex Sizes
LIVE 5K RUN-WALK
This year’s BBY5K will have a mass start, broken into waves based on your pace, and to keep things less crowded on the trail. Waves start at 8:00am with TEAMS, followed by a run/jog wave, and the “Enjoy your Park” pace.
As usual, your 4-legged running companion may join you. Please keep your leashes short, and remember to pick up after your pet.
VIRTUAL 5K RUN-WALK
Can't make it to the event? 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. Packets will be mailed to Virtual participants.
Sign up with your friends and running buddies! We will take the combined time of your Fastest 5 finishers to calculate Team Awards. Sign-up as many team members as you want and improve your odds of winning. Ask your Team Captain to enter your Team Name when he/she registers. Individual members will select your Team Name from the Pull-Down Menu in the Team Registration field. This is a LIVE event (only), and we look forward to watching the competition.
ONLINE REGISTRATION FEES AND SCHEDULE
BBY 5K Live Event Registration
$30 5K Standard Registration (includes your BBY5K Tee and Bib #)
$45 Hoodie 5K Registration (includes BBY5K Harborstone Hoodie, BBY5K Tee and Bib # )
$20 Youth Registration (14 & Under, includes BBY5K Tee and Bib #)
LIVE Event Registration will close at 11:59pm Saturday June 4. No Race Day Registration.
BBY 5K Virtual Event Registration (includes shipping charge for packets)
$40 5K Standard Virtual Registration (includes your BBY5K Tee and Bib #)
$55 Hoodie 5K Virtual Registration (includes BBY5K Harborstone Hoodie, BBY5K Tee, and Bib # -
limited time offer!)
$30 Youth Virtual Registration (14 & Under, includes BBY5K Tee and Bib #)
VIRTUAL Registration will close at 11:59pm Wednesday June 1.
RACE DAY • SUNDAY JUNE 5
MARYMOOR PARK CONNECTOR TRAIL
8:08AM WALK AND ENJOY
Review the route in advance, and know the course!
Parking is FREE to race participants Just east of the Velodrome near the Climbing Rock.
Arrive in time to pick up your packets and warm up.
START & FINISH at the Recreation Pad just west of the Velodrome.
PLEASE! Listen for instructions as to when your group may enter the START Corral!
All Registration is Online and in Advance. There is NO Race Day Registration!
There are NO REFUNDS. However, you may transfer your registration to a friend or future event.
There is NO Event-provided Gear Check.
Please review the course in advance! START/FINISH at the Recreation Pad by the Velodrome. Head west past the Sportsfields. DO NOT cross the Sammamish River. Head east on the Marymoor Connector Trail. U-turn just before the East Lake Sammamish Trail, back to the Finish. Turns on the course will be clearly marked and we will have volunteers at key locations.
Always watch for vehicles exiting parking lots, and be courteous around the sports fields where families are thinking about soccer and baseball more than running races.
After you FINISH, we will have water and refreshments.
Keep the celebration going! Head out to some of our favorite partners near Marymoor Park!
Super Jock ‘n Jill
Division winners will be acknowledged on BBY5K.com and our Facebook/Instagram page.
(M/F 14 & Under, 15-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70+, Fastest Dog, and Teams)
Four lucky participants will win a general admission ticket to an upcoming concert at Marymoor! Go to marymoorconcerts.com to check out the lineup! We will contact the winners following the race, and recognize them on our social media pages.
Results will be posted on BBY5K.com immediately following the race.
Your participation supports King County Parks. Get out and enjoy Your Big Backyard!
FREE Parking in gravel Triangle Lot by Climbing Rock.
Check-In / START at the Event Recreation Area next to the Velodrome.
Head South from the START.
Turn Right (W/B) on the narrow trail that passes soccer fields, playground, tennis courts and baseball.
Turn Left from Fields Trail to Connector Trail at west end of the park. Do Not Cross the Sammamish
Head E/B on the Marymoor Connector Trail. Mile 1 is just east of K-Lot (soccer parking).
Continue E/B on the Marymoor Connector Trail past the START. Stay Right on Trail!
Cross Marymoor Way at the Remote Control (RC) Airfield.
CAUTION! Watch for vehicles when crossing Marymoor Way. Stay Right!
Continue E/B across the Marsh Bridge. Mile 2 is halfway across the bridge. Stay Right!
U-Turn is marked before you reach the East Lake Sammamish Trail and Kiosk. Turn around. Head
W/B. Stay Right!
Continue W/B across the Marsh Bridge. Stay Right!
Continue W/B on the Marymoor Connector Trail past the RC Field. Stay Right! CAUTION! Road
Turn Right into the FINISH via the service road to the west of I-Lot!