Select the amount you would like to donate to David Castelli's 50 mi challenge.
Calculate your donation based on an amount per-mile David Castelli has committed to ride this September. Your total donation will be the amount you select multiplied by David Castelli's 50 mi challenge goal and will be charged up-front.
A receipt will be sent to this email address
Sign Up Now to Win a Trek Bike – ENDS TOMORROW!
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Sign Up Now to Win a Trek Bike – ENDS TOMORROW!
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