Running
Full Marathon
42.2 km
Start: Sep 13, 04:00 AM
120.00 USD

Running
Full Marathon
42.2 km
Start: Sep 13, 04:00 AM
120.00 USD
Running
Half Marathon
21.1 km
Start: Sep 14, 05:00 AM
85.00 USD
Running
10K
10 km
Start: Sep 14, 05:30 AM
60.00 USD
Running
5K
5 km
Start: 08:00 AM
40.00 USD
Join us for the Beat The Blerch Seattle, a fun-filled race set in the picturesque Tolt MacDonald Park. Experience beautiful flat trails through lush evergreen forests and enjoy delightful treats at our aid stations.
Aid Stations will be stocked with magical electrolyte beverages, water, gels, Nutella sandwiches, and birthday cake.
Monthly averages based on historical data (2000–present).
5k $40 10k $60 Half Marathon $85 Full Marathon $120
Road Runner Sports in the Greenlake area of Seattle; Friday, September 11th, noon-5pm. You may pick up your packet on Saturday at the race from 7am-11:30am BUT we encourage you to pick it up on Friday at Road Runner Sports so you have a relaxing, Blerchy race day morning.
Distance transfers can be done online until Thursday at midnight. Follow the instructions here to log in to RunSignUp and then you can transfer to a different distance. After Thursday they may be done at Packet Pickup or the morning of the race in person. Each transfer costs $15.
Transfers can be done online until Thursday at midnight. Follow the instructions here to do so online. After Thursday they may be done at Packet Pickup or the morning of the race in person. You can transfer in person at packet pickup or on race day as well, but expect a line. Each transfer costs $15. Please note that the shirt size cannot be changed during the transfer process.
Possibly, after the race, as long as we have enough extra shirts. If you’d like to swap out your shirt, bring your unworn shirt to the registration area after you’re done running and we can exchange your shirt. If we don’t have enough extras, we will not be able to exchange your shirt.
Yes, there will be vegan and GF bananas, chips, GU energy gels, and other treats.
Yes, the cutoff is 3:00pm.
No dogs or strollers of any kind are allowed on the course. This is for insurance purposes.
Yes, portable restrooms will be out on the trail and available for you to use.
Only Blerch merchandise will be available for purchase on race day.
Yes, please. We love costumes!
Yes, lots. Eat (and vomit) at your own risk.
Yes! But in the past we’ve sold out of the 5K race, so register now to secure your spot.
No, but we’d love to have you at the live race.
BECAUSE THEY CANTALOUPE.
Last updated: Jun 6, 2026, 12:16:10 AM
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