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Due to Covid 19 we have been made the painful decision to cancel this year's event. In order to protect your safety and the safety of our volunteers, vendors and staff we have come to the conclusion that this event cannot take place in mid-July. If you have already registered please check your email for your options. We hope to see you next year on July 18, 2021.
Join us for the 2nd annual Sundae Runday, where we combine our love of running with a love for ice cream! Finish your 10K, 5K run, or 2.5 mile walk with a delicious ice cream sundae from Molly Moons!
Proceeds benefitting Girls on the Run of Puget Sound
Race Day Schedule
8:00AM – Registration and Packet Pickup Opens
9:00AM – Free Kids Dash
9:15AM – Costume Contest
9:30am - 10K Start
10:00AM – 5K and 2.5 mile walk start
10:15AM – Ice Cream Time
Sundae FUNday Festivities:
Post-race ice cream treats for all, including your four-legged friends!
Water and whipped cream at the banana split halfway mark!
Chance to beat the ice cream
Free Event Photos
Kid’s Tent with Games & Crafts
Kids Dash with finisher ribbons and shirts!
Costume Contest - put on your Sundae best!
Traffic free course through Marymoor Park and the Sammamish River Trail. Pancake flat.
Stroller friendly event
Furry Friends: Dogs are welcome to run with us! Check the box at registration to pre-register your pup and guarantee a doggy treat in the Sundae line!
Packet pickup will be available on race day.
- Opening Day Sale - $25
- Register through March 19 11:59PM - $30
- Register March 20 through May 19 at 11:59PM - $35
- Register May 20 through July 17 at 8:00PM - $40
- Day of Event Registration - $45
- Kids 12 and under - $15
- Opening day sale - $35
- Register through March 19 11:59PM - $40
- Register March 20 through May 19 at 11:59PM - $45
- Register May 20 through July 17 at 8:00PM - $50
- Register by July 1 to guarantee your shirt size.
Additional race information can be found at https://sundaerunday.com/.
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