100K Relay on the Prom

Friday, May 14, 2021

12th & Prom

We're celebrating the Prom Centennial with a 100K Relay on the Prom! Teams will run all night along our historic Promenade to complete the race, culminating with breakfast and prizes the next morning.

We will be following health and safety guidelines from the Oregon Health Authority and the CDC in organizing this race.


More details will be added in the FAQ below, as we get closer to the event. Registration is $50 per runner. Call 503-738-3311 to register.


  • 100K is 62.13 miles, 20 laps on the Prom (each lap 3.1 miles). Estimated completion time: 10 hours. The race will begin at 8pm and continue through the night.

  • Why at night? The Prom is well-lit and running at night will help with social distancing for the safety of participants. Plus, it’s fun.

  • Route: 12th Ave to Ave U and back on Prom.

  • 15-20 teams, 2-7 runners per team.

  • How do you decide who runs what? Each team can decide how far each team member will run and the timing. So, if a team member wants to run three laps in one go, that’s fine. Or, if you want to take turns throughout the night, that works too. The more team members you have, the fewer miles each person will need to run to complete the 100K.

  • Runners will be given a voucher for breakfast at Pig 'N Pancake.

  • Runners are not required to wear masks while running, however, we ask that masks be worn at other times to protect fellow participants and event staff.

  • Parking will be available in the 12th Ave parking lot (at the Prom), with overflow at 12th and Necanicum. Each team will have a reservation for two parking spaces. The second parking space can be used for camp chairs so teams have a place to relax when not running.

  • Hotel accommodations: see special deal below.

  • Restrooms are located at 12th and Prom, at the Turnaround (Broadway and Prom), and at 12th and Necanicum.

  • Prizes—fastest team, best costumes. We encourage you to show your team spirit by dressing in a costume, if you wish.


Prom Centennial Sweepstakes

If you're visiting Seaside and staying overnight in one of our hotels, you're eligible to enter the Prom Centennial Sweepstakes! To enter and find out more about this year-long celebration, go to SeasideProm.com.

Special Deal for Visitors to Seaside
If you're joining us from out of town and staying overnight to participate in the 100K Relay on the Prom, check out the Holiday Inn Express & Suites! They are offering a discount of 15% off of your room when you book directly. They provide a Grab-&-Go hot breakfast daily. Other amenities include fitness facility, pool, hot tub and sauna (availability dependent on government restrictions). Holiday Inn Express & Suites is a pet friendly hotel. Each dog is greeted with a welcome doggy bag including a treat for our furry friends. To reserve a room at this special rate, call 503-717-8000 and tell them you are participating in the 100K Relay on the Prom.

Thank you to our Sponsors!

100K Relay on the Prom Graphic.png
runkle consulting group cropped.png
HIE SEA Logo.jpg
Pig N Pancake Logo 2.png