Donation Amount

Select the amount you would like to donate to Yiwei Mao's 100 mi challenge.

$50

$100

$250

$500

$2,500

Other

Donation Calculator

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