Find something fun, informative, and healthy to do and enjoy in the Regional Parks. Explore the history, culture, and natural resources in Alameda and Contra Costa counties.
The Trails Challenge program encourages park visitors to explore new trails by foot, bicycle, horseback, or even in-line skating! Every year more than 10,000 people participate in this FREE self-guided hiking and bicycling program to explore the East Bay Regional Parks and to keep fit outdoors. Trails Challenge is a free program made possible through a partnership between the East Bay Regional Park District, the Regional Parks Foundation, and Kaiser Permanente.