The Lilac Bloomsday Association presents the 45th running of the Lilac Bloomsday Run.

  • April 30 - May 9, 2021
  • 12 Kilometers (7.46 miles)
  • Worldwide Virtual Race

Bloomsday FAQs

How do I register for Bloomsday 2021?

Registration for Bloomsday 2021 begins on January 1. You may register by clicking here.

How does virtual Bloomsday work?  

Click here to read all the details about how you participate in Bloomsday 2021 in the new virtual format including how you report your time.

I would like to receive a race number personalized with my name.  How do I do that?

If you register online by March 13, 2021, you may personalize your race bib with your preferred name. 

When will I receive my finisher shirt?

All finisher shirts will be mailed in late May. As a reminder, these are finisher shirts and are only given to those who complete Bloomsday and submit their finish time on the Bloomsday Results Portal at between April 30 and May 10.

Where do I run my 12k?

You may complete your 7.46 miles /12 km for Bloomsday 2021 on your favorite running or walking route -- anywhere in the world. It's up to you!

When do I run my 12k?

You will run your 12k between the dates Friday, April 30 and Sunday, May 9, 2021.

How do I report my finish time?

Bloomsday will publish a Results Portal on the Bloomsday website on Friday, April 30. From April 30 through May 10, 2021, you may report your finish time.


What if I don’t report my finish time?

Those who do not report their finish time by May 10, 2021 will not be sent a finisher shirt. To receive your official finisher shirt, be sure to report your finish time between Friday, April 30 and Monday, May 10, 2021 at


How do I purchase Bloomsday souvenir gear like the 2021 collector’s medal?  

When you register for Bloomsday, you will have the opportunity to purchase souvenir gear including medals, shirts, magnets, pins, posters and the adorable stuffed animal Vulture.

When will I receive my race number and coupons in the mail?

If you register by April 10, the Franz Starter Kits will be mailed to Bloomsday participants shortly thereafter. Those kits will include your bib number and coupons, and should arrive in U.S. mailboxes between April 20-29. If you register after April 10, your Franz Starter Kit will most likely arrive after the April 30-May 9 race dates.


I have registered for Bloomsday 2021, but now I’d like to buy a souvenir item or sign up for Bloomsdog.  Can I do that?

Yes, the easiest way to add a souvenir item, including purchasing the Bloomsdog Race Kit, is to reply to your email receipt from when you registered earlier this year. Just let us know what you'd like to add and whether it's okay to use the card you paid your entry fee with. Alternatively, you can contact us using the online form.


I have registered for Bloomsday but my address recently changed.  How do I update my address so that I do not miss out on my Franz Starter Kit or my finisher shirt?

The easiest way to update your address is to reply to your email receipt from when you registered earlier this year. Just be sure to include the new address and if you registered multiple people, who the new address applies to. Alternatively, you can contact us using the online form.