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Weight Loss Challenge

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  • Fee & Registration

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    $65, Registration Required


The St. Luke’s Weight Loss Challenge is a program designed to help you achieve a healthy weight and an active lifestyle. We provide the content; you provide the motivation!

Achieve lifelong behavior change by prioritizing your physical health and emotional well-being through the digital tools, such as the Carium app and ReFresh nutrition program. Impact more than just the weight on your scale by preventing and reducing the cost of chronic health conditions, and improve your quality of life by joining the Weight Loss Challenge!

Our goal is for you to lose 1% of your total body weight each month for a total of 6% by the final weigh-in. Those who meet all requirements (weigh-ins and weight loss) will equally split the $10,000 prize pool at the end of each six-month session!

The Weight Loss Challenge kicks off twice a year, running for six-month durations. Participants may choose to re-enroll at the end of the 6-month program to participate for the length of a year! You will learn more below about how to register as a Keep it Off Cash participant.

The Challenge will run May 1 – October 27, 2023, with weigh-ins taking place throughout the week prior; April 24 – 28 and final weigh-ins occurring October 23-27, 2023. Participants will complete their weigh-ins prior to the launch of content and programming on May 1. More information about weigh-ins and scheduling can be found by selecting the weigh-in site informational documents under the Special Instructions section below.

More information about re-enrolling, terms of eligibility, and Keep it Off Cash is outlined below in the FAQ section or can be found in the rules. 

With your paid registration you receive:

  • A chance to earn part of the $10,000 prize money
  • Access to the ReFresh Nutrition Program modules, created by a registered dietitian
  • Use of Carium, a digital health app to stay accountable and connected
  • A digital Toolkit designed with your overall health and well-being in mind
  • Weekly bite size health tips and recipes via the Carium app
  • Challenges via the Carium app with a chance to win prizes for participating and persevering
  • Invitations to join monthly, lifestyle medicine webinar sessions featuring engaging speakers highlighting the dimensions of well-being; physical, social, emotional, occupational/financial, environmental, spiritual, physical, and social


Registration Instructions

  • $50 (March 1-24, 2023) – early bird registration
  • $65 (March 25-April 23, 2023) – general registration
  • $65 +processing fees (April 24-28, 2023) – late registration

Individuals who wish to register for the challenge after the general registration deadline can register, pay, and will receive all the benefits of the program but WILL NOT qualify to compete for prize money or perseverance prizes. Please note, you will also absorb the associated processing fees from Eventbrite. 

Participants wishing to join following the April 28, 2023, late registration deadline will be asked to register for the next six-month program that begins on November 1, 2023. Please reach out to [email protected] to schedule a late weigh-in by May 5, 2023.

Register Online

Special Instructions


ATTEND EACH REQUIRED WEIGH-IN - If you miss one of the required weigh-ins you are still in the challenge and will continue to receive health tips, may attend webinars and programs, and participate, but you are no longer qualified to win prize money or perseverance prizes. (Please dress appropriately—i.e., t-shirt and shorts/capris/sweats; no jeans or heavy garments.) 

Please refer to the weigh-in site informational docs below and follow the instructions to schedule a weigh-in at your preferred site

Magic Valley, Elmore, Wood River Weigh-in Sites

Treasure Valley, McCall, Fruitland, Baker City Weigh-in Sites

Note: you will be notified via Carium at the designated mid-way point of the challenge and asked to digitally upload a weight measurement. More instructions will follow. Failure to upload will not disqualify you from remaining prize eligible.


Please download the rules for a full description of the challenge. Includes media release and release of liability.


Attention: If you are not employed by St. Luke’s, you must complete and submit the included W9 prior to October 13, 2023 to remain eligible for a prize payout. Our accounts payable team requires this step to complete and process your prize payout. 

Classes & Events

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  • calendar icon
    Next Date & Time
    Thursday, Jun 08, 2023 12 p.m.-12:30 p.m.
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    $49.00, Registration Required

    The ReFresh program is a four-week nutrition education course designed to help you get on track with healthier eating.

Click each question below for its answer:

What happens after I register?

You will receive a confirmation email from Eventbrite (Note to Gmail and MSN email account holders: check your spam folders!) Next, schedule a weigh-in! We also encourage you to download the Carium app. 

More information can be found on our website and by viewing the weigh-in site informational documents under the special instructions section.

Do I have to register online to participate?

Yes, it’s the only registration option as it helps to ensure the accuracy of your information. 

Visit Eventbrite to register.

How do I schedule a weigh-in and when do these occur?

Weigh-in weeks for the 2023 calendar year are April 24-28 and October 23-27, 2023. You will also receive a notification to digitally upload a mid-point weight via the Carium app. 

You will receive links to the weigh-in site informational documents via email or can access them on our website. These can also be accessed under the special instructions section. 

Please refer to the directions related to your desired location to schedule a timeframe. Sites are available throughout the system.

How often do I need to weigh in?

Although we suggest keeping track of your progress at home in whichever format is most beneficial to you, we require two on-site weigh-ins during each six-month period of the program (initial and final weights). 

To remain eligible to win prize money, you must attend each weigh-in at one of the official weigh-in sites.

We also ask for one digital upload via the Carium app at the designated mid-point of the program. You will receive a notification to do so (this does not determine prize eligibility).

What should I wear when I weigh in?

Please wear light fitting clothes such as 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 is keep it off cash and how do I participate?

Keep it off cash means “Maintain, don’t gain.” 

If you met or exceeded the 6% total weight-loss goal during the previous challenge, you are eligible to then re-enroll and compete as a keep it off cash participant. 

If you are re-enrolling, your final weight will be used to determine your prize eligibility during the next challenge; i.e. maintain that weight, don’t gain.

How do I win prize money as a keep it off cash participant?

Those whose weights are the same or lower than their previous final weights (taken during last challenge) will win an equal share of the $10,000 prize money to be split among the other eligible participants. 

Please note that participants are only eligible to compete for and receive prize payouts for a total of 18 months, i.e. once as a first time participant and twice for keep it off cash. 

Keep it off cash participants who have fulfilled their 18-month window of eligibility can continue to enroll and in lieu of a prize payout, can compete to win their registration payment back.

I didn't meet the final goal in a previous challenge, but can I register now?

Yes! However, participants are only eligible to compete for prize money in the weight loss challenge for a total of 18 months, regardless of having received a payout or not; i.e., once as a first-time participant and then twice as a keep it off cash participant. 

If you have exceeded this timeline, you may enroll, and will receive all the benefits of participating in the program, minus eligibility to receive a prize payout or perseverance prizes.

Keep it off cash participants who have fulfilled their 18-month window of eligibility can continue to enroll and in lieu of a prize payout, can compete to win their registration payment back

What if I want to re-enroll after participating in the six month program?

Did you meet your weight loss goal of 6%? 

  • YES: You will then be designated as a keep it off cash participant and your goal will be to maintain don’t gain. Your final weight must then be EQUAL to or LOWER than your final weight from the previous challenge.
  • NO: You will not receive any allocation of prize money and can choose to register for the next available weight loss challenge program. You must attend the initial weigh-in for the new program and the weight loss goal remains the same (i.e., must lose 6% of your total body weight based on updated measurements) to remain eligible for prize money.
How are winners determined?

Winners are determined by the percent of body weight lost, not the number of pounds lost. Our goal is for you to lose 6% of your total body weight by the final weigh-in. 

Here’s how you figure it out: 

  • Take the number of pounds lost (ex. 12 lbs) -from initial weigh-in
  • Divide by the starting weight (ex. 12 lbs divided by 200 = .06)
  • Multiply by 100 (ex. .06 x 100 = 6%)
How is prize money distributed?

New participants who lose a minimum of 6% of their total body weight and keep it off cash participants whose final weight is the same or lower than their starting weight will win an equal share of the $10,000 prize money to be split among the eligible participants.

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!

I'm a St. Luke's employee. Can I pay with payroll deduction?
No. Unfortunately, we are unable to offer this option due to legal constraints.
Can I Participate if I've Had Bariatric Surgery?


Can I Participate if I'm Pregnant?
No. Unfortunately, due to health and safety concerns, pregnant individuals are not allowed to participate for prize money.
Can I Form a Team?
We encourage you to gather friends, family, and colleagues to create a team for social support! However, there is no additional prize money for a team category.
Can I Get My Money Back?

Please read all 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.

Do I Need to Download the Carium App to Participate?

No, you don’t, but our expectation is that you do and we highly suggest that you utilize it. We will be pushing out all our information and learning material several times a week directly to your phone and the quarterly challenges will only be accessible via the Carium app. 

You will also receive a notification to submit a digital weight update at the mid-point of the challenge. 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 WLC-S23 (for paid registrations only). Check your email for a message from [email protected] and click “verify email” to confirm your account. 

We suggest using your personal email, not your email when registering for Carium. If you need further assistance, please email us

If you already have and use Carium, you will be added to the new WLC program group.

Am I Out of the Challenge if I Miss a Weigh-in or 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 the lifestyle medicine webinars, participate in Carium challenges, and win perseverance prizes.

What is the ReFresh Nutrition Program?

This is an exciting new component of the weight loss challenge! 

Nutrition is a key component of successful and sustainable weight loss. This modulated course has been designed by clinical dietitians on the lifestyle medicine team to help participants grow their knowledge base through engaging coursework, recipe ideas, tips, tricks, and more!

Do I Have to Pay Taxes on the Perseverance Prizes?

Any valuation of the prize(s) received is based on available information provided to St. Luke's, and the value of any prize awarded may be reported for tax purposes as required by law. 

Each winner is solely responsible for reporting and paying any and all applicable taxes related to the prize. 

Notwithstanding the foregoing, any prize received by an employee of St. Luke's, with a value in excess of $25.00, will be reported to St. Luke's Payroll Department so appropriate taxes can be deducted and reporting can be completed. 

What does this mean?

  • It is your responsibility to report and pay all applicable taxes on any prizes awarded to you if the value is in excess of $25.00. We will notify you if this is the case.
Is This a Medically Managed Program?

No. We recommend consulting with your healthcare provider prior to engaging with and participating in this program. 

This has been designed as a fun and motivating way to lose weight and achieve healthy, sustainable behavior change. However, we have structured the program based on peer reviewed research and evidence-based weight loss guidelines. 

The ReFresh nutrition program has been developed by and is managed by clinical dietitians.

Do I Have to Complete the Exit Survey?

No, but we sure do appreciate it if you would! Completing the survey is important because we use the collected data to plan for the next iteration the challenge and use your feedback to steer our progress forward. 

Thanks in advance!

Who Should I Contact with any Questions?