Races >

Castle to Hanauma Bay TT

COVID-19 UPDATE: Virtual TT 2021

Due to ongoing restrictions related to COVID-19, we will be holding the Castle to Hanauma Bay TT as a one day virtual challenge. This event is sanctioned by USAC and will be part of the year long ASBRA 2021 Point Series.

Saturday March 6th 2021

Course Description

The course is 20K in length starting at Maunawili Elementary School and finishing at Hanauma Bay State Park, racing on Kalaniana’ole Highway except through Waimanalo where the course will use back roads to avoid high traffic intersections. For full course details see the Castle to Hanauma Alternate Route Strava Segment. To compete simply ride the course on Saturday March 6th between 6:00 A.M. and 3:00 P.M., record your ride with a GPS tracker, and either register with us using Strava, or upload you ride data (details to be provided). While there will not be any marshals on course to enforce TT rules, in the spirit of the event we encourage all riders to compete solo and avoid drafting. IMPORTANT: this ride is completely unsupported and you must follow the rules of the road and observe all traffic signage. Please watch out for pedestrians, cars, stray dogs, etc. Stay safe and healthy out there.

Castle to Hanauma Course Map

Registration (2021)

Registration is $10 for all participants, and no USAC License is required. Registration is available Online @ bikereg.com (through the day of the event: March 6th 2021)

All participants must sign the USA Cycling Event Release form.


As with previous years we want the be respectful of the small residential neighborhood near our start line. Nobody likes being woken up by slamming doors and loud voices at 6 in the morning when they don't have a reason to be awake. This year we're going to try and do a better job of making sure we don't disturb the neighborhood. To that end here are the RULES:

Olomana Neighborhood Map

Race Day Schedule (2021)

Saturday March 6th 2021


TitleGenderAge Group
Golden MasterMen50-59
Golden MasterMen60+
Golden MasterWomen50-59
Golden MasterWomen60+


No cash prizes. Gift cards will be awarded to the top three places in each category.