Sundae Runday
- Date
- August 16, 2026
- Distance
- 10K · 5K · 2 mile walk & more
From the Organizer
Join us for the 6th annual Sundae Runday, where we combine our love of running with a love for ice cream! Finish your 10K, 5K run, or 2 mile (plus a little bit) walk with a delicious ice cream sundae with all the toppings!
Race Day Schedule:
8:30AM – Registration and Packet Pickup Opens
9:00AM – Costume Contest
9:15AM – Kids Dash
9:30AM – 10K Start
9:45AM – 5K and 2 Mile start
10:00AM - Ice cream time!
10:30am - Awards
Sundae FUNday Festivities:
- Post-race ice cream treats for all, including your four-legged friends!
- Finisher's item, it will be something fun, and functional!
- 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 items and ice cream
- Costume Contest - put on your Sundae best!
- Traffic free course through Seward Park and the shores of Lake Washington.
- 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!
Registration Info:
10K
January 1 - 9: $35
Jan 10 - May 16: $45
May 17 - July 16: $50
July 17 - August 15: $55
Day of Event Registration - $60
5K & 2 Mile Walk
January 1 - 9: $30
Jan 10 - May 16: $40
May 17 - July 16: $45
July 17 -August 15: $50
Day of Event Registration - $55
- Kids 15 and under - $25 (includes shirt and ice cream)
- Kids dash - $10 - (includes ice cream and finisher's ribbon)
- Register by July 15 to guarantee your shirt size.
Teams of 6 or more get an automatic discount. Once the 6th person signs the first 5 participants get a refund!
Volunteer with us and get a race shirt, and a trip through the sundae toppings bar without all that pesky running!
Benefiting Let Me Run - Let Me Run is building a new generation of men by teaching boys to be their best selves through a character development program powered by running.
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
78°
Typical Low
58°
Chance of Rain
13%
Based on US Climate Normals data from Seattle Boeing Fld, 4 mi from the venue.
Host City
About Seattle, WA
Population
741,440
as of 2023
Elevation
40 ft
Nearest Airport
SEA
Seattle–Tacoma International Airport · 10 mi
Time Zone
Pacific Time
From Endurance Grid
A big city race. Expect multiple lodging options and plenty to do the day before.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Sundae Runday, put it on the calendar, and turn “someday” into a start date.
Coming Up
More Running races near Seattle, WA
5K Run & Walk: Roy Flores Scholarship Fund
5K
Less than a mile away
Furry 5K Fun Run and Walk
5K
Less than a mile away
Run & Walk with Pride
Less than a mile away
Run Juneteenth Day 5K/10K/13.1 SEATTLE
Half Marathon · 10K · 5K
Less than a mile away
From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the Sundae Runday?
- Sundae Runday is a running race held in Seattle, Washington on August 16, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the Sundae Runday?
- Sunday, August 16, 2026 in Seattle, Washington at 5895 Lake Washington Blvd S, Seattle, WA. Check the event page for exact start times and wave schedules.
- How do I register for the Sundae Runday?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
Sundae Runday
Aug 16, 2026