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Weight Loss Challenge 2021

  • Venue & Location

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  • Fee & Registration

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    Varies, Registration Required


Get healthy the right way. Lose 3% of your total body weight within 180 days and 5% by September 2021. Meet all requirements (weigh-ins and weight loss) to equally split $20,000 in prize money!

Your paid registration gets you:

  • A chance to earn part of the $20,000 prize money
  • Access to a free health coaching app to stay accountable and connected
  • An online toolkit with a 2-week menu and shopping lists
  • Weekly health tips and recipes
  • Quarterly challenges via our health coaching app with prizes!
  • “Ask the Expert” sessions highlighting the dimensions of well-being: physical, social, emotional, occupational/financial, environmental and spiritual
  • Monthly prizes for participating and persevering
  • Social support and connection


Registration Instructions

Registration begins September 11, 2020.

  • $59 early bird: September 11-October 24
  • $65 general: October 25-30
  • $35 late: October 31-September 2021
    • Late registration will still get you all the benefits, but you won't be eligible for the prize money.

Launch day is November 2, 2020.

Get the official Weight Loss Challenge rules for 2020-2021.

Register Online

Special Instructions


Attend all the required weigh-ins to qualify for the prize money. If you miss any of the weigh-ins, you'll still be in the challenge and will continue to receive health tips, attend classes and programs, and can win perseverance prizes, but you'll no longer be eligible for the prize money.

Due to COVID-19, initial weigh-ins will be appointment only. Please see the Weigh-In Site information for your preferred site to find information on how to make appointments.

Weigh-in Dates and Goals:

  • Initial Weigh-In: October 26-30, 2020
  • 90-Day: January 11-16, 2021 (GOAL - maintain weight over the holidays; within 2 pounds of initial weigh in OR weight loss of any amount)
  • 180-Day: April 12-17, 2021 (3% body weight lost by 180-day weigh-in)
  • Final: September 13-17, 2021 (5% body weight lost by final weigh-in)

Weigh-in Sites:

Click each question below for its answer:

How are the winners determined?

Winners are determined by the percent of body weight lost – NOT the number of pounds lost. 
Here’s how you figure it out:

  • Take the number of pounds lost (ex. 10 lbs)
  • Divide by the STARTING WEIGHT (ex. 10 lbs divided by 200 = .05)
  • Multiply by 100 (ex. .05 x 100 = 5%)
How often do I need to weigh in?

There are FOUR weigh-ins for the 2020/2021 program.

  • Initial: October 26-October 30, 2020
    • NOTE - If you attended a final weigh-in for the 2019/2020 Challenge we can use it as your initial weight for the 2020/2021 challenge
  • 90-Day: January 11-16, 2021
    • GOAL - maintain weight over the holidays (no more than 2 pounds over initial weight) OR any amount of weight loss
  • 180-Day: April 12-17, 2021 (3% body weight lost by 180-day weigh-in)
    • Final: September 13-17, 2021 (5% body weight lost by final weigh-in)

     In order to compete for prize money, you must attend EACH weigh-in at one of the official weigh-in sites.

    Do I need to download the CARIUM app to participate?

    No, you don’t – BUT – we highly suggest that you do! 

    We will be pushing out all of our information three times a week directly to your phone and the quarterly challenges will be logged via the CARIUM App.  It’s a great way to stay engaged AND win prizes! 

    To get started download the app from Google Play or the Apple App store. Install and open Carium. Tap “Join Carium” at the bottom and enter code SL-WLC. Check your email for a message from and click “verify email” to confirm your account. 

    If you need further assistance, please email us or watch our Carium App 101 webinar.

    Am I out of the challenge if I miss a weigh-in or don’t hit the weight-loss goal?
    You won’t be able to win a part of the prize money BUT you will still receive the weekly health tips, you can attend “Ask the Expert” webinars, participate in challenges and win perseverance prizes. 
    How do I earn a FREE entry into the FitOne 5k in September 2021?

    Attend the first three weigh-ins (first weigh-in in October; 90-day in January; and 180-day in April) and lose 3% of your body weight by the 180-day weigh-in to earn a free entry into the FitOne 5k walk/run in September 2021!

    *Free entry is non-transferable; must register for FitOne by Sept 1, 2021.
    What should I wear when I weigh in?

    Please wear a t-shirt and shorts/capris/sweats. 

    Jeans/heavy clothing are discouraged. It will be marked on your weigh-in form and you will be expected to wear similar clothing at your final weigh-in. 

    What if I miss a weigh-in?

    You will still be in the challenge, but you will be ineligible to win prize money. You will continue to receive health tips, and you can attend any of the classes and programs. 

    It’s the ONE and ONLY rule that keeps you in the running for prize money so please plan accordingly. Don’t wait until the last day to weigh in. 

    When is the final celebration?
    We will celebrate all of your success on September 29, 2021 at 6 p.m. – location/date TBD in Twin Falls and Boise/Meridian.  
    Do I have to attend the finale in September 2021?
    No, but you are encouraged and invited to attend this fun celebration! 
    Where are the monthly weigh-in sites?
    Do I have to register online?
    Yes, it’s the ONLY registration option as it helps ensure the accuracy of your information.

    Register Online

    I’m a St. Luke’s employee. Can I pay with Employee Payroll Deduction?
    Unfortunately, we are unable to offer that option due to legal constraints. 
    What happens after I’m registered?
    You need to get your first OFFICIAL WEIGHTPlease visit the weigh-in sites for days/times they are open!
    Can I get my money back?

    Please read all of the requirements and rules of the challenge prior to registering as all registrations are NON-REFUNDABLE and non-transferable to next year’s event, NO exceptions. This policy stays in effect whether you are injured, have an unexpected business or family emergency, pregnancy, etc.  There are NO exceptions.  

    Can I participate if I have had bariatric surgery?


    Can I participate if I am pregnant?
    Unfortunately, pregnant women are not allowed to participate for prize money. 
    Can I still participate and win if I’m an employee of St. Luke’s?

    Yes. Only those of us who directly organize and promote the challenge are unable to compete for prize money.

    So sign up and start creating a healthier YOU! 
    Can I form a team?
    We encourage you to gather friends and family and create a team for social support! However, there is no prize money for a team category. 
    As a KEEP IT OFF CASH participant, do I need to attend all the weigh-ins?


    • Must have starting weights (Oct/Nov 2020) at (or lower) than their final weights from the WLC in September 2020
    • Must attend all required 2020/21 weigh-ins; weight cannot be more than 2 pounds over starting weight at the January and April weigh-ins; weight CAN be lower than starting weight
    • Those whose final weights are the SAME or LOWER than their starting weights will win an equal share of the $20,000 prize money to be split among the other eligible participants