Please note: Tour of the Unknown Coast is unable to offer refunds or transfers of your entry.

The Tour of the Unknown Coast (TUC) was organized in 1978 to promote cycling for all ages and abilities. The TUC is a 501c3 non-profit group that benefits local organizations which volunteer to support this event. The Tour of the Unknown Coast has been called one of California’s toughest century rides and among the most beautiful rides anywhere. For 2019 we’re stepping up our game and adding the new Avenue of the Giants Century. In addition, as we have done for many years, we offer a 100K, 50 mile, 22 mile and 8 mile route.