Frequently Asked Questions

Please note: Our FAQ is updated from time to time. If you still have questions, contact us.

Where and when is the event this year?

The Pre-Race Expo, including packet pick-up and event registration, will take place from 11am to 3pm on Saturday, March 21, 2020 at the Mercer Island Community and Event Center, located at 8236 SE 24th St., on the north end of Mercer Island. Race Day is Sunday, March 22, 2020 and also takes place at Community Center. All Race Day events are scheduled for Sunday morning.

Tell me about the event.

This event raises funds for colon cancer prevention and Rotary charities. The event offers something for everyone, including the Swedish Cancer Institute Half Marathon Run and Half Marathon Walk around Mercer Island, the BMW Seattle 10K Run (a Bloomsday 2nd seed qualification run), the Recology 5K Run/Walk, and the non-competitive Kids’ Dash (for children age 10 and under). The event is USATF sanctioned and all routes are USATF certified.

What is going on during the event?

Race Village, located at the Community Center, will have family fun, giveaways and friendly faces at our sponsor booths!

How and when do I register?

The best way to register is online. Click on the registration link at the top and choose the event you wish to register for. Online registration closes on Thursday, March 19 at 11:59PM. Or, you can mail in the registration form, which you can also download here. Mail-in registrations and payment must be post-marked by March 16 or earlier. You can also register on Saturday, March 21 at the  Pre-Race Expo at the Mercer Island Community & Event Center, from 11:00am – 3:00pm. Registration on the morning of the events is open from 6:30 – 9:00am. Registration for each event will close 15 minutes prior to its starting time. Race results may not be available on-site for last minute registrations. Register early to take advantage of early registration discounts.

Do you offer Senior and Military Discounts?

Yes! Seniors (60+) will automatically receive a $5.00 discount on each event when a participant enters his/her age during the online registration process. Active duty military members can receive discounted event pricing by selecting the Active Military Registration category on the GetMeRegistered link.

How do I access and manage my team?

In order to access your team you need to sign into your GetMeRegistered account by clicking here. From this link you should be able to manage your team and send out emails. 

Where can I park while I am at the event?

We have several parking areas available, as well as regular shuttles from those areas to the Community Center. Click here for a detailed map of parking areas and traffic.

What about dogs and baby strollers?

Unfortunately, the terms of our insurance policy require that no baby strollers or dogs be allowed on any of the courses other than service dogs.

Where and when can I pick up my race packet?

All shirts, bibs, and timing chips will be distributed at the Pre-Race Expo, taking place on Saturday, March 21 from 11:00am – 3:00pm, at the Mercer Island Community & Event Center, located at 8236 SE 24th Street on Mercer Island. These items can also be picked up on the day of the event at the registration area in the gym at the community center, between 6:30 – 9:00am.

I won’t be able to come to the Pre-Race Expo. Can someone else pick up my packet?

Yes, you can have someone else pick up your packet. All we ask is that runners make sure they know who is picking up what, so someone doesn’t show up not knowing where their packet is.

I decided that I’d like to participate in a different event than what I registered for. Can I switch races?

Yes. However, no refunds will be offered, and charges will apply if the race you are switching to is more than the one you are currently registered for. Please email your inquiry to info@mercerislandhalf.comPLEASE NOTE: There will be no switching of races after Saturday, March 14. If you would like to switch the event you are participating in after this deadline, you will need to pick up your packet during the packet pick-up times at the community center and then bring the packet to the help desk to make the change.

Where can I put my belongings while I am participating in my event?

Visit the SynchroKnit Gear Check powered by Wigwam, where you will be able to check your items if you like.

Will there be race awards?

Yes, the top 3 overall male and female for each event will receive a gift card to Super Jock ‘N Jill.

Are water, carb and electrolyte replacement opportunities available on the course?

There will be seven water stations on the Half Marathon course, with three NUUN electrolyte enhanced drink stations and one GU Gel station. The 10K course has two water stations on the course and one NUUN electrolyte enhanced drink station. The 5K course has one water station on the course. For more details, see the Maps & Parking page.

What about medals?

The first 1,500 Half Marathon participants will receive finishers medals!

If I can’t participate after registering, can I transfer my registration to someone else?

Yes. If you would like to transfer your registration to someone else before Tuesday of race week, please email your name and the information of the substitute person, including their name, event, gender, email, date of birth, shirt size, address and phone number to We will change the registration to the updated information, making a note that it is a substitution. When the substitute person arrives at packet pick-up, they will have to sign the entry form. PLEASE NOTE: There will be no transferring of registrations after Tuesday of race week. If you would like to transfer your registration to someone else after this deadline, the substitution person will have to pick up your packet during the packet pick-up times at the community center and then bring the packet to the help desk to make the change.

Is there a time limit on finishing an event?

All courses officially close at noon and course marshals and police are released. Please take this into consideration when choosing which event to register for.

Where is there convenient lodging if I am traveling from out of town?

There are no hotels or inns in Mercer Island. However, there are several choices for accommodations in Bellevue which is just a few miles away.

Are donations required?

We encourage all participants to meet a $100 minimum fundraising goal. Although fundraising is not required, we hope you’ll help us in our fight against colon cancer. If you do wish to make a donation in addition to your event registration fee, you can do that either on this website or on the paper-based registration form (you cannot pay by credit card unless you register online). More information on donations and fundraising is available on our fundraising page.

How much of the money raised goes to charitable causes?

Unless otherwise requested by the donor, all team and other fundraising proceeds raised through the Mercer Island Half go to The Cancer Patient Assistance Fund at Swedish Cancer Institute, a national organization whose mission is to empower local communities to promote prevention and early detection of colon cancer and to provide support to those affected. After event expenses are paid, revenue from registration fees goes to several charitable causes supported by the Foundation of the Rotary Club of Mercer Island. See the Rotary Club of Mercer Island website for more information.

To what organization should donation checks be made payable?

Donation checks should be made payable to MI Rotary Foundation, and mailed to MI Rotary Foundation, PO Box 1, Mercer Island, WA 98040, or dropped off at the event. Donations can also be made online with a credit card; see our fundraising page for more information. All donations are fully tax-deductible as charitable contributions.

How do teams work?

Teams can be formed online through the registration website, managed by For more information, check our teams web page. If you are with a company that may wish to form a team with pre-paid registrations for employees, please contact us at

Must the Team Captain sign up first?

Yes, the Team Captain establishes the Team name so that all persons wishing to sign up for his or her team are included correctly.

What does “official second seed Bloomsday qualifying race” mean?

Men and women that finish the 10K Run at a race time that is faster than the qualification time will qualify for the “Second Seeding” of the Bloomsday race. This is the seed, or starting group, just behind the elites. The qualifying time is 39:00 minutes for men and 47:00 minutes for women. For more information, visit the Bloomsday website.

Where will results be posted?

Results will be posted on-site at the Community Center at Mercer View, on this website, and in the Mercer Island Reporter.

Is my time based on Chip Time or Gun Time?

USA Track and Field association rules require that events only recognize gun time for official results. Both chip time and gun time will be available in event results.