Select the amount you would like to donate to Kirt Greenberg's 100 mi challenge.
Calculate your donation based on an amount per-mile Kirt Greenberg has committed to ride this September. Your total donation will be the amount you select multiplied by Kirt Greenberg's 100 mi challenge goal and will be charged up-front.
A receipt will be sent to this email address
The challenge starts NEXT WEEK - Free Entry!
Sign Up Now
The challenge starts NEXT WEEK - Free Entry!
Sign Up Now