How can I change my personal registration information?

You can manage all your info by logging in through the link on the top right of the page and visiting your Participant Dashboard.

Where do I mail a check donation?

If you would like to mail in a donation, please follow the steps below:

1. Make checks payable to Sarcoma Foundation of America.
2. Please note the event (The 2025 Sisu Open) and the individual you would like your donation to support.
3. Mail to:

Sarcoma Foundation of America
Attn: The 2025 Sisu Open 
9899 Main Street, Suite 204
Damascus, MD 20872

What happens if the weather forecast calls for rain on event day?

This is a rain-or-shine event. If severe weather is anticipated, please check the event website for last-minute updates!

What is The Sarcoma Foundation of America's tax identification number?

The Sarcoma Foundation of America is a registered 501(c)(3) nonprofit organization. Tax ID number is 52-2275294. Contributions to the Sarcoma Foundation of America are tax-deductible to the extent permitted by law.

Can I bring a dog to the event?

We love animals just as much as you do, but for safety and liability reasons, pets are not allowed. Registered service animals are welcome.

Have more questions? 

Please reach out to us at info@thesisuopen.org and we will be glad to help!