1 cycling event in Castro Valley, California

Limit of one 2026 discount per rider.

To qualify for the $85 referred new rider discount you must go to CONTACT US and send us your name and the name of the referring rider. The referring rider name can only be used once, and if you use someone's name without their permission your registration will be deemed invalid. Both referring and referred riders must register by the 9/15/2026 deadline.

To qualify for the $145 referring rider discount price you must go to CONTACT US and send us your name and the name of the referred new rider. Only one referral qualifies for the discount. Both referring and referred riders must register by the 9/15/2026 deadline.

Note that for 2026 we are also offering a double century three ride discount if you sign up for our Best of the Bay double century plus the Carmel Valley double century plus the Knoxville double century. By signing up to ride all three rides, your cost for each ride is just $150 – a significant savings! For information on how to bundle these events please contact the Quackcyclists at [email protected] for instructions for registration and payment.

If you sign up for a discount and we are unable to verify the required elements, then your registration will be deemed invalid.