Friends of Trione-Annadel is the nonprofit dedicated to protecting the health of our treasured local state park, Trione-Annadel. Through donations from our community, we support the maintenance and development of its trails, structures, and open spaces - ensuring a healthy environment for wildlife and continued accessibility for the public.

Friends of Trione-Annadel
Community Thank you Dinner


Please join us on Saturday, October 1, 2022
for an evening of thanks


550 White Oak Dr, Santa Rosa, CA 95409

Saturday October 1st 5-9 PM

Tickets available for purchase at $150 per plate

Tables of eight also available for $1200 per table


Our Community Benefits Program is a newly launched and super exciting membership program that gives our community an opportunity to discover the park in fresh and new ways. Enjoy perks from local and well-known outdoor businesses, like virtual speaker series and exclusive discounts, all while you are helping fund park projects. The cost of your membership goes directly back to Friends of Trione-Annadel whose mission is to support the park. Support the land that you love with us. #FOTA


Friends of Trione-Annadel was created in September 2017 in response to increasing maintenance needs of a highly used recreational.

Trione-Annadel State Park has over 45 miles of official trails and hosts 12-13,000 people per month of all types - hikers, mountain bikers, runners, equestrians, and more.

To support the preservation and maintenance of this unique natural resource, Friends of Trione-Annadel was formed with the intent to protect park resources and deliver a high-quality visitor experience. Read more


With support from many generous donors, Friends of Trione-Annadel has funded numerous projects benefiting the park. Recent projects included the installation of 17 new Kiosks (donated by the Trione family) throughout the park and the completion of repairs to the dam at Lake Ilsanjo.

Our goals for 2022 include supporting completion of approved trail work on Channel, Two Quarry, and Lawndale trails and educational opportunities for grammar school programs throughout Sonoma County.

Read more


Trione-Annadel State Park is situated at the northern edge of Sonoma Valley and is adjacent to Spring Lake Regional Park in the City of Santa Rosa. Within its 5,200 acres and 40+ miles of hiking, biking and equestrian trails, it offers many recreational and wildlife viewing activities.

Trione-Annadel State Park's interconnected trail system includes an 8.5 mile section of the Bay Area Ridge Trail. The park’s trails are a popular destination for runners, hikers, mountain bikers and equestrians. Read more

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