Challenge of the Century

Virtual Fundraising Event

Registration Extended to

June 30th!

Four Month Virtual Challenge

June 1, 2021 - September 30, 2021

Challenge Yourself -

Accomplish something beyond your everyday routine!

Cliff Hiking

How Far Will Your Challenge

Take You?

Run, Walk, Bike, Hike,

Swim or Paddle

100 Miles,

100 Days,

1 Million Steps

Only $49

Registration Starts March 15, 2021
Early Registration $44 before April 15, 2021
After April 16 - May 15 $49
After May 16 - June 15 $54
Use code COTC1

Women Walking

Challenge of the Century
Let Your Challenge
Take You Where You Want To Go

About This Event

Begins June 1 - ends September 30, 2021

You can walk, run, bike, hike, swim, paddle (or other exercises you enjoy) 

100 Miles over four months or

100 Days over four months or

Walk, run, hike 1 Million Steps over four months!

That’s 25 miles a month, about 5 miles a week, a mile a day with 2 days off a week!

You got this!


This challenge is for all levels of ability.
Complete this Challenge SOLO
or with a TEAM
and divide up the miles.



As a Solo the social connections you’ll make on the website are encouraging and inspire you to complete your challenge everyday. You’re setting the pace for yourself, and participating with a bunch of other people who want to be part of something bigger than themselves. 

As a Team you can get the whole family, the office or a group of friends  to participate and everyone contributes to the miles! 

Show off your Surfing Madonna Challenge of the Century Medal

and feel proud of your efforts!


Take the full 100 Mile Challenge and do it in the shortest amount of time.

Take the 100 Day Challenge and do the most miles.

Take the 1 Million Steps challenge and do it in the shortest time.


You’ll log your miles, time and upload photos (optional) through your RunSignUp profile (created at time of registration) and earn digital badges every ten miles!

There will be prizes for top finishers and top teams! 


This challenge is NON-EXCLUSIVE meaning ALL miles from other races, challenges, or in-person races count towards this goal. For example, if you run Boston Marathon, those miles would count towards this challenge.



Registration Begins March 15 - June 1

Challenge Begins on June 1st

Challenge Ends September 30, 2021

Finisher Medals and Swag Mailed July 2021

There are 6 divisions for this challenge - At the time of registration, you’ll choose between:
SOLO 100 Miles, SOLO 100 Days, SOLO 1 Million Steps
TEAM 100 Miles, TEAM 100 Days, TEAM 1 Million Steps


When signing up for this division, you’ll complete the 100 miles, 100 days or 1 Million Steps entirely on your own by September 30, 2021. Challenge begins on June 1st. Permitted activities are listed below. No retroactive mileage allowed (meaning accumulated miles don’t start until June 1st.) You’ll register for the challenge and log your miles through RunSignUp, which will track your progress throughout your challenge journey. The leaderboard will be based on distance completed, not pace. 

Man running with bridge in background


When signing up for this division, you’ll have a team and you’ll divide up the 100 miles, 100 days or 1 Million Steps however you’d like. Your team will complete the challenge by September 30th. Challenge begins on June 1st. Permitted activities are listed below. No retroactive mileage allowed. You’ll register for the challenge and log your miles through RunSignUp, which will track your progress throughout your challenge journey. The leaderboard will be based on distance completed, not pace. Each teammate will receive their own Medal and Goods in the mail. To REGISTER as a Team: The first teammate to register will create the team. Then all teammates thereafter will join that team when they register. Teammates don’t have to complete the miles together or live in the same town! Each teammate will log their miles through their own RunSignUp account and the miles will be allocated to your team’s total miles! 

**Team discounts available, please email before you register. Discounts can’t be applied after you register.

Walking Club


Permitted Activities for the 100 Miles and 100 Days challenges:

  • Running

  • Walking

  • Cycling (regular or stationary)

  • Hiking

  • Stand Up Paddle boarding

  • Rollerblades/skates

  • Elliptical

  • Swimming & Rowing

Permitted Activities for the 1 Million Steps Challenge: 

  • Running

  • Walking 

  • Hiking

  • Treadmill

  • Rollerblades/skates

  • Elliptical

**You may transfer divisions anytime at no charge

Couple Walking


Registration will open from March 15th to June 1st. The Challenge begins on June 1st and you’ll have until September 30, 2021 to complete the challenge.

Walking the Dog


FREE shipping for USA orders. International participants are welcome, but an additional shipping fees will apply. Once your package is shipped, you’ll receive an email with a tracking number. Packages will be shipped approximately in July 2021.

SUP With a View


For tracking your distance and time, you can use whatever app or system that works best for you (Garmin, MapMyRun, Strava, etc). Once you register, you’ll be able to MANUALLY log all of your miles through your RunSignUp account until you complete the challenge. We’ll track your progress and you can see how all the other participants are doing as well. Leaderboard will be based on distance, not pace! This is about endurance, not speed. To keep it flexible for all of the participants, we are not requiring you to sync or upload your .FIT or GPX files! Your mileage entries will be manual and you can use whatever tracking or fitness app you’d like.

Image by Serena Repice Lentini


To compete for awesome PRIZES, follow and tag @smchallengeofthecentury or using the hashtag #SMchallengeofthecentury

Group Running

Meet Our Sponsors!

Great Support from Great Products


Hydration Replenisher

Our Purpose
We’re a happy, hydrated bunch at Ultima. A playful, positive, fun, welcoming team. And we’re here to keep you hydrated. And smiling. :-)
Our mantra is “Live your ultimate life, every day.”
For us, hydration is happiness. We believe our electrolytes have the power to bring you hydration happiness, too. 
That’s why we've been making Ultima electrolyte hydration drink powders for over 20 years. To keep you active, healthy and happy. Because if you’re feeling good, you’re feeling happier.
Beyond electrolytes, we obsess about fun and tasty flavors – without sugar or junk.
We think finding electrolyte flavors you love is like meeting your hydration BFFs. Life is better when you hydrate happy, together.

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Bare Republic

Clean Simple Products You Can Trust

Our Purpose

We’re dedicated to enhancing your everyday adventures with clean, simple products you can trust. 

At Bare Republic, we believe everyone should have the tools to fully enjoy a healthy life. That’s why we’re committed to creating safe, effective products that are fun and accessible to all.



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Virtual Challenges

One Step at a Time

Exciting new "Challenge" series of events!

A virtual challenge that you can run, walk, bike, hike - even swim, surf or paddle!

Perfect for all abilities, all ages, You choose your Challenge!

Need a reason to pursue a Challenge?

This is a great way to build fitness, test endurance, commit to healthy habits.

Train for in-person races. Find friends and build an on-line support base to stay inspired.

An awesome Team Builder for schools, families, office.

The Challenge of the Century can be done as a SOLO or a TEAM. Everyone receives their own:

• Finishers Medal and cool Surfing Madonna Challenge swag

• Inspiring online Challenge community - Mileage tracking, leader board, group support

• FREE shipping 

Build camaraderie along with fitness:

Find friends or family and everyone can contribute to overall distances, and days.