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Helen Putnam Trails Challenge group hike

Thank you, Trails Challenge Sponsors!

The Trails Challenge is supported by the Sonoma County Regional Parks Foundation with sponsorship from REI Co-Op, Whole Foods Market, Green Valley Consulting Engineers, EBA Engineering, Spring Lake Village, the Pacific Foundation for Medical Care, the Sonoma County Public Library Foundation, Shutterbug Camera Shops and the Sonoma County Water Agency.

Thank you, sponsors, for your generous contributions.

Trails Challenge sponsors

Thank you, Trails Challenge Hikers

Congratulations to everyone who completed the 2017 Trails Challenge. Hundreds of participants took to the trails to get healthy, spend time with family and friends, and discover new parks. Thank you for joining us!

Use the Trails Guide Year-Round:

View the Guidebook Online

Download a Printable Guidebook 

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