2021 Grindstone Registration


300 Registered Runners

Race Date:
Friday, September 17, 2021
Sunday, September 19, 2021
Race Length:
101.85 miles

Entry fees/dates:

$250 before June 1
$275 before July 1
$300 before August 1
$330 thereafter
Gain / Loss:
23,200 / 23,200 ft
Time Limit:

38 hours

Online Registration for Grindstone 100 is now full. In order to join the waitlist please email the race director at czealand@eco-xsports.com. Waitlisted runners will be granted entry on a first come, first serve basis. Further instructions will be sent via email.



DGIF Permit

Grindstone 100 course crosses a Wildlife Management Area which requires each runner to have in their possession a current Hunting/Fishing license or Access Permit.  For information on how to obtain one of those please click here.

Race Waivers

Please read any waiver carefully. It includes a release of liability and waiver of legal rights and deprives you of the ability to sue certain parties. Do not agree to this document unless you have read and understood it in its entirety. By agreeing electronically, you acknowledge that you have both read and understood the text presented to you as part of the registration process. You also understand and agree that events carry certain inherent dangers and risks which may or may not be readily foreseeable, including without limitation personal injury, property damage or death. Your ability to participate in the event(s) is/are subject to your agreement to the waiver and by agreeing herein, you accept and agree to the terms of the waiver and release agreement.

Waivers: Grindstone 100 Waiver | eco-x Waiver

You must be over 18 years of age OR the parent/legal guardian of a minor under 18 years of age OR the legal guardian of an incapacitated and/or mentally challenged person in order to agree to the waiver.