Donation Amount

Select the amount you would like to donate to Harold Tan's 100 mi challenge.

$35

$70

$120

$265

$500

OtherSurprise Harold

Donation Calculator

Calculate your donation based on an amount per-mile Harold Tan has committed to ride this September. Your total donation will be the amount you select multiplied by Harold Tan'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:

$