Sun March 22, 2020 Directions
Countdown to Race Day

5K Run/Walk

$29 8:00AM PDT - 10:30AM PDT Price increases after November 30, 2019 at 11:59pm PST

USATF Half Marathon

$62 7:00AM PDT - 10:30AM PDT Price increases after November 30, 2019 at 11:59pm PST

Union Bay Kids 1K

$11 7:45AM PDT - 10:30AM PDT Price increases after November 30, 2019 at 11:59pm PST
UW Center for Urban Horticulture

Kick off spring with this destination event and spring time tradition! It's Washington's most beautiful run/walk as participants start at an urban wildlife sanctuary and head to one of the nation's most iconic cherry blossom displays - all in the heart of Seattle’s renowned UW campus!


— NEW FOR 2020!

The inaugural Union Bay 1K Kids Run and a USATF certified Cherry Blossom Half Marathon!



Our "Share The FB Event" for a coupon code is back! Mark "going" then share the event to your own Facebook page, take a screen shot of it and send it to us through the main Cherry Blossom Run FB Messenger or email We will then send you a unique 20% coupon code to use during registration from now until December 31st, a 15% off code from January 1st to February 28th, and a 10% off code from March 1st til March 21st. Click Here for Facebook Event Link



The Top 3 female and male finishers in each age category for each race will earn exclusive "Legion of Bloom" award medals! Top finishers in each category earn extra prizes. 


--- PRICING ---

- USATF Half Marathon - $60 EARLY BIRD with price increases up to $72

- 5K Run/Walk - $28 EARLY BIRD, with price increases up to $38

- Kids Union Bay 1K Run - $10 EARLY BIRD with price increases up to $16.

- Packet mailing if unable to attend packet pick up - $15

- Finisher commemorative medals - $3.

- Unisex participant tech shirts included.

- New hoody swag and hats available for purchase.



Start at the Center for Urban Horticulture you’ll wind your way through the Union Bay Natural Area and around the sports facilities, including Husky Stadium. Cross the pedestrian overpass into central campus and head up and around towards the main entrance. Finish in the Red Square surrounded by amazing gothic architecture and the iconic cherry blossoms!🌸 Half marathon runners will utilize the Burke Gilman Trail to Matthews Beach Park and back for the first year.



The UW Botanic Gardens is a major sponsor and beneficiary of the event. You'll learn about their UW Center For Urban Horticulture and have an opportunity to experience their beautiful grounds and venue.


--- SCHEDULE ---

7 AM - No same day packet pick up or registration (There is a mailing service to mail your packets this year for a fee if you cannot attend packet pick up). Arrive early for parking, warm up, stretch, drink coffee, and immerse yourself in the Union Bay Natural Area.

7:30 - USATF Half Marathon start.
7:45 - Union Bay Kids 1K start
8:05 - 5K run/walk start
8:30 AM -11 AM - Finish Line Water, refreshments, donuts, vendors, "Legion of Bloom" award announcements, prizes, cherries.

Free professional event photography at the Red Square and in The Quad when you wear your bib!



- Parking is FREE in all open campus parking lots! Just 30 stalls at the start in the Center for Urban Horticulture. 100 stalls in E4 Parking Lot nearby. 1,000+ stalls available at the large E18 and E1 parking lots which we highly recommend. We encourage carpooling and/or Uber/Lyft rides.

Please study this link to parking maps on campus:
UW Parking Map

Stay tuned to our emails and social media for any hotel discounts.



Saturday, March 21, 2020 at the Graduate Hotel Ballroom and foyer. You'll pick up your bib, pins, shirt, goodies. Stay tuned for expo schedule and list of vendors! The Graduate Hotel is also offering discounted hotel packages for people traveling from out of town. Enjoy a 10% discount on food and drink at the rooftop Mountaineering Club bar and restaurant after the expo.


--- FAQ ---

Am I allowed to pick up for friends?

Are strollers allowed?
Yes, for the 5K only. Please start in the back and make sure they have all-terrain wheels.

Are dogs allowed?
Yes, for the 5K only and on leash of course! Please pick up after your pet and start near the back of the last wave.

May I step on plants in the Union Bay Nature Area?

May I climb the trees for amazing photos anywhere on campus?

Enjoy our video recap from last year!
Legion of Bloom Award Medals!


Have you been doing speed work and hill training?! Because the top 3 male and female finishers in respective age categories (ages 0-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70-79, 80-100) will receive these large, exclusive, and powerful "Legion of Bloom" award medals and names will be featured in a Legion of Bloom website section to be shared on social media and emails.

Large Medals With Japanese Flare for Half Marathon and 5K. Spinner medals for the Kids 1K!


Race Contact Info

If you have any questions about this race, click the button below.

Race Website

Additional race information can be found at


UW Center for Urban Horticulture


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