The Zeitgeist Half Marathon is a fund raising event for Racing Unlimited, Inc. which is an Idaho 501c3 non-profit corporation. Between the Sawtooth Relay and the Zeitgeist Half Marathon, we typically raise about $60,000 per year with both races.  This funds research projects to find treatments and a cure for polycystic kidney disease.

Polycystic Kidney Disease is a genetic disease that affects an estimated 12.5 million people worldwide. PKD patients develops cysts that typically lead to kidney failure.

To date we have funded the following research projects:

“The Role of B-raf in Aberrant Cell Proliferation in Polycystic Kidney Disease”, Dr Darren Wallace

“Does Polycystin-1 Reverse Cystogenesis?”, Stephen Parnell, Ph.D.

“Calcium and cAMP Signaling Mechanisms in PKD”, James P. Calvet, Ph.D.

The Roles of Heart Polycystin-1 in ADPKD”, Xiaogang Li, Ph.D.

Prior to funding research at the Kidney Institute we donated our proceeds to the PKD Foundation. Since 2002 Racing Unlimited, Inc. has raised $511,000 for PKD research.

Read More About the Research Grants

The Idaho Donor Network is dedicated to educate Idahoans about the need for organ and tissue donation.

  • Over 76,544 people wait for life saving organ transplants.
  • Over 800 Idahoans await an organ transplant.
  • Over 600,000 people had life enhancing tissue transplants just last year.
  • Over 250 Idahoans in the year 2000 have had eyesight restored from the gift of cornea donation.

For more information view the Idaho Donor web site at If you decide to become an organ donor, you can complete your donor registration online!

Thanks to all our Sponsors and Volunteers!
Thank You to all who participated!

To see the final results, see the results page.

Hope to see you all next year!

Procrastinators, it’s time to commit!

The Zeitgeist Half Marathon entry fee increases to $100 after 10pm on Wednesday Nov. 2, 2022.

Click Here to Register!

We are looking for volunteers to help with getting the park set up, handing out packets, distributing T-Shirts and beverages, water stations, course tasks, and tear down after the event.

If you are interested in helping this race be successful please click this link

Or email your contact info to:

Volunteers receive a T-Shirt and Meal!

Highlands Hollow Sign Up Party
Tuesday Sept 10, 2019

What: Zeitgeist Half Marathon Sign Up Party & Training Run/Walk
When: Tuesday, September 11, from 3 pm to 9 pm.
Where: Highlands Hollow Brewhouse
2455 N Harrison Hollow Lane, Boise

Join us for discounted entry fees – must be present for discount!