The Sonoma County Trails Challenge is an invitation to discover your Regional Parks by hiking, running, biking or riding the trails featured in the Trails Challenge guidebook.
The guidebook includes park notes, trail descriptions, turn-by-turn directions, maps, and themed hikes. You're invited to download the guidebook and use it as a year-round resource for hiking itineraries and trail information.
Download the Trails Challenge guidebook.(PDF: 4.73 MB)
In previous years, we've offered incentives for hiking five or more Trails Challenge routes during the summer. That annual Trails Challenge promotion has been on hold during the pandemic, and we are looking forward to organizing a new Trails Challenge promotion next year.
Thank you to our Trails Challenge sponsors.