Thousands of people have participated in the program since it began in 1993. You can hike, bicycle or ride horseback on challenge trails designed for all levels of ability. The guidebook also contains helpful hints on equipment and trail safety.
The Trails Challenge is sponsored by the Regional Parks Foundation in partnership with Kaiser Permanente.
The website also has full listings for activities in all the regional parks, or pick up a copy of the "Regional in Nature -- Activity Guide" at visitor centers.
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