Select the amount you would like to donate to Mariah Darling's 100 km challenge.
Calculate your donation based on an amount per-kilometre Mariah Darling has committed to ride this August. Your total donation will be the amount you select multiplied by Mariah Darling's 100 km challenge goal and will be charged up-front.
A receipt will be sent to this email address
Canada Revenue Agency requires all receipts to display a postal address
