Have a question related to Cupid’s Undie Run registration, donation, fundraising, or event deets? We gotchu!


How much does it cost to register?

Registration is currently $25 for Cupid’s Undie Run 2025

What do I get for registering?

Well, aside from the most fun you’ll ever have and the sense of satisfaction for helping fund research for the Children’s Tumor Foundation, registering for Cupid’s gets you:

  • Exclusive access to our pre and post run party (no spectators allowed)
  • Costume contest
  • Award ceremony for top teams and individuals
  • DJ dance party in your undies (some locations have live bands)
  • Deals from local sponsors
  • A customizable fundraising page
  • Tools for easy fundraising
  • The ability to earn cool prizes through fundraising!  
  • The exhilarating feeling of running through the streets in only your undies… without getting arrested
  • A fun and judgement-free environment to just be you.. in your undies… so what are you waiting for!?

Is there an age limit?

All participants in Cupid’s Undie Run must be 21+ the day of the event since alcohol is being served. You must bring ID. No ID, no entry, no exceptions.

Is my registration refundable?

Registration is nonrefundable. In the event you are unable or unwilling to adhere to state and local guidelines, your registration will not be refunded.

I can't attend but still want to fundraise. What can I do?

What an amazing and compassionate person you are!  

If you’ve already registered for Cupid’s Undie Run, we’ll certainly miss you at the event, but the good news is you can still fundraise and earn rewards! Yay! The last day for fundraising to count toward rewards is March 15, 2024. 

If you haven’t registered for Cupid’s Undie Run and want to fundraise, you can register as a “Virtual Runner” and earn those sweet rewards.  Virtual Runner rewards will be mailed to the address provided no later than March 31st.

What’s this credit card processing fee all about?

Looking for a way to make the most impact? Credit card processing fees quickly stack up with each registration or donation we receive. This year we are offering our participants/donors the opportunity to include the credit card processing fee when they register or make a donation so that their dollar amount can be fully represented and more money can go to research. This option is not required but is available for those extra charitable cherubs.


Are donations tax deductible?

Absolutely! The Children’s Tumor Foundation is a 501(c)(3) non-profit organization, so any donations made are fully tax deductible.

Where do I send checks?

Checks can be made payable to Children’s Tumor Foundation.  Send these to either:

Regular Mail
Cupid’s Undie Run c/o Children’s Tumor Foundation
Mail Code: 6895
P.O. Box 7247
Philadelphia, PA 19170-0001
Children’s Tumor Foundation – Lockbox 6895
400 White Clay Center Drive
Newark, DE 19711

Remember to print out the offline donation form and send it with the check so we can be sure it’s processed correctly once it’s received! Feel free to share this form with your donors if they want to mail the check themselves. 

**Keep in mind, it can take a few weeks to receive, process, and enter a donation into the system. If you’re concerned about the status of your check, feel free to reach out to us through the Contact Form below and we’ll look into it for you!

Does my offline donation (i.e. mailed in check) count towards my fundraising total?

For offline donations (i.e. cash or check donations sent in), yes we will count them towards your fundraising and reward total, once they are received. PLEASE DON’T SEND CASH IN THE MAIL! Hold the cash and send a check in its place (or to really simplify the process just do a credit card donation to yourself in the same amount!)

My donation isn’t showing up (or went to the wrong person)!

Please fill out the Contact Form at the bottom of this page with your donation information and we’ll get back to you!

Can I get another copy of my donation receipt?

You sure can! Simply contact the participant you donated to and they can have another copy of your receipt sent your way.

How do I resend donation receipts to my donors?

  1. Login to
  2. Click “Donations” at the top, then “Donations List”
  3. Click the blue “re-send receipt” box for the donation in question
  4. Voila! Donation sent

Monthly gift? I love this idea! Tell me all about it.

Cupid’s has added a monthly gift option for donors. Monthly gifts help our dearest supporters make an ongoing impact throughout the entire year. It’s a great way to space out a larger gift, or if you’re shy at fundraising, it’s a sure-fire way to get you that OPEN BAR you’ve been eyeing! On the payment page of the donation process, check the box “make this a recurring gift” and your contribution will be added every month!

How much money do I need to raise?

There is no minimum amount required to fundraise, however we encourage fundraising so you can earn some super cool prizes! 


When is Cupid's Undie Run 2024?

Check out our cities and dates here!

How will COVID affect the event?

We understand that there is still uncertainty, we remain optimistic that we will be able to partying pantless in-person come February. Our focus remains on fundraising to find a cure for neurofibromatosis (NF). We will monitor all national, state, and local public health guidelines in order to give you the Cupid’s event you know and love, while ensuring the safety of our runners, event directors, staff, and volunteers! If you have questions, please contact [email protected]

Is Cupid's Undie Run a run, a party, or both?

BOTH! Cupid’s Undie Run kicks off with mingling, music and drinks. Then we all head out for a mile(ish) run and stretch it out back inside at an epic dance party. It’s all for charity and all in your undies!

Cupid’s Undie Run is a fun run, not a race.  It is not timed, and there are no timing chips or race bibs. There are not winners (aside from the Children’s Tumor Foundation). We encourage everyone to run together as a big group (umm, body warmth, duh). If you are competitive at heart, we suggest you channel some of that competitiveness to see if you have what it takes to become a top fundraiser!

How long is the run?

It’s only about a mile long in each city.  A mile of fun in your undies!

What should I bring on event day?

ID and undies, duh. The rest is optional. Try to keep it light so you don’t accidentally lose anything or have stuff get lost in the bag shuffle. Oh, and try to plan where you’ll keep your ID/phone/etc. while you’re out running the streets. A baggie into your undies? Gross, but it works. Stuffing into your socks? That works. Fanny packs are always hilarious, too.

What should I wear?

Well, we will definitely be in undies! However, if undies aren’t your thing, get creative and try out a costume, tutu, or onesie! Have fun with it, we just ask that participants keep it PG-13.

Where will Cupid's Undie Run take place? Is there parking? Do you have a map?

Check out your city’s webpage, Facebook event page or your confirmation email for the exact venue location and address for your city. There is also a map on your city’s webpage (some maps are still being created, so apologies for the delay!)

Parking is generally available, but we encourage use of public transportation, especially if you’re having any drinks at the party! Please arrange for a designated driver.

What time do doors open? What time is the run?

For most cities, doors open at noon and the run is at 2pm. Check your city’s webpage or Facebook event for additional details.

Are spectators allowed in the venue?

No, only registered participants will be allowed in the venue. We will be pushing capacity, so no exceptions. Spectators are encouraged to line the run course and cheer on all their friends, family, and strangers. Someone’s gotta take the pictures, after all!

Will it be cold?

It’s February, sooo… probably. It all depends on your latitude and Momma Nature. DC had 4 feet of snow in 2010. It was a balmy 45˚F in 2011. Depending on the city, our best guess is that temperatures will range from cold to holy-crap-I-can’t-feel-my-face, unless you’re in Florida, where you will probably need… sunscreen!

What if it rains or snows?

Cupid’s Undie Run will happen rain or shine. It’s only a mile… so you can do it! If there is a weather emergency, we will act accordingly (e.g. an epic snowstorm hit NYC a few days prior to the 2013 event, so we had to delay it by 1 week). Keep an eye on the main page and on your city’s page for alerts. Alerts show up as a yellow bar located at the top of a city page and will also be announced via email and on your city’s Facebook event page.

Where is packet pickup?

Cupid’s Undie Run is a fun run, not a race, so there are no race bibs or timing chips to pick up beforehand. For most cities, check-in (where you get your wristband and earned rewards) is the morning/day of the event. A few cities will have early pickup prior to the event. If your city is having an early packet pickup, you will receive an email about it, but also check your city’s Facebook event page to stay up to date.

Can I bring my dog?

Cupid’s loves dogs, but allowing them to join you on the run depends on the city. Want to make sure your furry friend can join? Reach out to using the Contact Form below and let us know what city you’ll be running in. We’ll get back to you and let ya know if your pup can join!

Can I push my child in a stroller during the run?

Sure! Just be sure to make other arrangements for your child pre- and post- run since they will not be allowed inside the venue.


How do I join a team?

You should have the option to join a team during registration. Be sure you are joining a team that’s located in the city where you will be able to pick up your fundraising rewards prior to the event. We promise you won’t want to miss those!

I'm trying to join a team but it's not appearing in the dropdown!

Trying to join a team but can’t find it? Make sure you’re registered in the same city as the team captain. Just a reminder: be sure you are joining a team that’s located in the city where you will be able to pick up your fundraising rewards prior to the event. We promise you won’t want to miss those!

How do I edit my team page?

Team captains have access to edit their team page. Captains can log into their account at, click on the Team dropdown, then Edit Team Page. From there, they will be able to edit the team name, team fundraising goal, content for team page, and add pictures.

How do we change Team Captains on our team?

The Team Captain defaults to the person who started the Team. To change this title to another team member, the current Team Captain must log in to their account at, click on the Team dropdown, then Team Members. They should have the option from there to make any team member the Team Captain!

What does a Team Captain do?

A Team Captain defaults to the person who started the Team. They have the ability to edit the team page and fundraising goal. They can also email all of their team members for things like fundraising encouragement.


What are the fundraising rewards for 2024?

View our awesome rewards here!

Are rewards based on team totals or individual fundraised amounts?

All rewards are earned based on participant’s individual fundraised amounts. Each member of a team that reaches a reward level will have earned themselves that awesome item!

I earned open bar status. What does that “open bar” entail?

Open-bar gets you free drinks from noon – 4pm (times may vary slightly by city).  Open-bar will be limited to a select number of beers and rail drinks. Please drink responsibly and arrange for a designated driver or use of public transportation.

When will I get my awesome earned rewards?

Rewards at the $250 level and under will be given out at check in on the day of the event. All other rewards will be shipped directly to you by the end of June.

What are the awards/rules for top teams?

Top team competition rules:

  • The team in each city with the highest fundraising amount will earn a special award and receive recognition in the awards ceremony.
  • Team fundraising totals will be for all individuals signed up on a team.
  • Fundraising totals will be based off the LIVE dollar amounts reflected on at the time of the awards ceremony.
  • Team members are eligible and will receive fundraising awards for their individual participation as well.
  • There is not a limit on the number of individuals registered per team, but we urge against creating super-teams (e.g. teams bigger than 25 or so people) that put other teams at an unfair advantage in the team fundraising competition. Play nice.
  • Remember, rewards are earned based on individual fundraising totals, so encourage each of your team members to raise $250 that way everyone can enjoy open bar!

What is the award for top fundraisers?

The top 3 fundraisers in each city will get the coolest medal you’ve ever seen… a big ol’ blingin medal in the shape of undies!

When is the last day for my fundraised $$ to count toward earned rewards?

Keep fundraising your pants off, even after the event is over, and earn yourself even more Cupid swag!  The last day your fundraised dolla dolla billz count toward your earned rewards will be March 15th.


What is neurofibromatosis (NF)?

NF is a group of genetic conditions that causes tumors to grow on nerves throughout the body and may lead to blindness, deafness, bone abnormalities, disfigurement, learning disabilities, disabling pain, and cancer. NF affects 1 in every 2,000 births across all populations, ethnicities, and genders equally. There is no cure yet, but several promising NF clinical trials are underway. As researchers continue to learn more about the underlying causes of NF and what makes tumors grow, we get closer to the development of effective treatments.  

Where does the money go?

Cupid’s Undie Run is a fundraising program of the Children’s Tumor Foundation.   Proceeds benefit the Children’s Tumor Foundation (CTF), a 4-star rated charity, and the world’s leader in NF research.

Does the charity ever change?

Nope! We started Cupid’s Undie Run to help a friend’s little brother who was fighting neurofibromatosis, so we’re going to keep fundraising our pants off and raising funds and awareness for the Children’s Tumor Foundation until we find a cure!  

The Children’s Tumor Foundation (CTF) is a 501(c)(3) non-profit organization. CTF prides itself on its 4-Star Charity Navigator rating, spending over 80% of its revenue on programs and research. The Children’s Tumor Foundation was established in 1978 as the first grassroots organization dedicated to finding treatments for NF. Today, CTF is a highly recognized, national, non-profit foundation, and a model for innovative research endeavors.