Select the amount you would like to donate to Marek Wyszomirski's 100 mi challenge.
Calculate your donation based on an amount per-mile Marek Wyszomirski has committed to ride this September. Your total donation will be the amount you select multiplied by Marek Wyszomirski's 100 mi challenge goal and will be charged up-front.
A receipt will be sent to this email address
