Select the amount you would like to donate to Marcin Zaremba Marcin Zaremba's 12 mi challenge.
Calculate your donation based on an amount per-mile Marcin Zaremba Marcin Zaremba has committed to ride this September. Your total donation will be the amount you select multiplied by Marcin Zaremba Marcin Zaremba's 12 mi challenge goal and will be charged up-front.
A receipt will be sent to this email address
