Sun March 22, 2020 Directions
Countdown to Race Day

5K Run/Walk

$28 8:00AM PDT - 10:30AM PDT Price increases after October 31, 2019 at 11:59pm PDT

USATF Half Marathon

$60 7:00AM PDT - 10:30AM PDT Price increases after October 31, 2019 at 11:59pm PDT

Union Bay Kids 1K

$10 7:45AM PDT - 10:30AM PDT Price increases after October 31, 2019 at 11:59pm PDT
UW Center for Urban Horticulture

Kick off spring with this destination event and spring time tradition! It's Washington's prettiest run/walk event 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 UW campus!


— NEW FOR 2020!

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

2. Cash prizes for top 3 male & female in both the 5K and Half! 1st place $300, 2nd place $200, 3rd place $100 with increases based on number of participants.



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.



Beginning 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 the first years and then the 520 HWY Bridge Trail and Arboretum Trail in future years.



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.



To be determined. Stay tuned for updates.


--- FAQ ---

Am I allowed to pick up for friends?

Are strollers allowed?
Yes, please make sure they have all-terrain wheels.

Are dogs allowed?
Yes, 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?

Race Website

Additional race information can be found at

Race Contact Info

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

Enjoy our video recap from last year!
5K Course Map

5K Course

Course Description:

The 5K run starts at the Center for Urban Horticulture. Then run on gravel trail past wildlife through acres of Union Bay Natural Area before crossing over Ravenna Creek bridge to circle the soccer and baseball fields and the new outdoor track. Re-join more Union Bay shoreline as you head towards sports facilities on gravel road. You'll run around the newly renovated Husky Stadium! Pass by the new UW Link Rail station and over the newly constructed Pedestrian Overpass. Turn right at the end of the overpass and head uphill on Rainier Vista. Turn right onto E Stevens Way NE and stay to the left side of Stevens Way on sidewalk! Watch your pace because this is nearly a mile uphill! You'll stay on E Stevens Way NE all the way to the main entrance. Turn left on Memorial Way NE until the end of the road. Turn left onto the wide path and finish in Red Square adjacent to The Quad!

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!



UW Center for Urban Horticulture


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