Donation Amount

Select the amount you would like to donate to Michael Collum's 100 mi challenge.

$35

$70

$120

$265

$2,500

OtherSurprise Michael

Donation Calculator

Calculate your donation based on an amount per-mile Michael Collum has committed to ride this September. Your total donation will be the amount you select multiplied by Michael Collum's 100 mi challenge goal and will be charged up-front.

$0.30 cents/mi

$0.50 cents/mi

$0.80 cents/mi

$1/mi

$1.50/mi

$2/mi

Donation Total:

$