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