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Trione-Annadel Burn Bioblitz
Trione-Annadel State Park
Santa Rosa, CA
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Trione-Annadel Burn Bioblitz
Use your smartphone to monitor nature's recovery after the October 2017 Nuns Fire, which burned approximately 60% of Trione-Annadel State Park. Using the iNaturalist app, we will photograph as many living things as we can find in an area that burned. Please be prepared for a moderate hike of up to 4 miles for this event.

Bioblitzes are gatherings of scientists, citizen scientists, land managers, and more, all working together to find and identify as many different species as possible. Bioblitzes not only help land managers build a species list and atlas for their park and provide invaluable data for researchers, they also highlight the incredible biodiversity in these Bay Area oases.

Join California State Park staff, docents and  volunteers, as we hike up Warren P. Richardson Trail and Two-Quarry trail.  Total distance may be dependent on how much we stop and photograph (typically 3/4 to 1 and a half miles). We might see wildflowers that only bloom after a fire, or have not bloomed here for many years, or are blooming more profusely as a result of the fire.

Registration is free, and attendees will get lunch, but be sure to let us know you're coming!

Wear hiking shoes, layers appropriate for weather; bring water and a snack. Some trails are rocky and uneven. It is a minimum one-mile hike up Warren-Richardson to the burn area on a moderately sloped dirt fire road. HEAVY RAIN CANCELS. There is a day use fee $7 per car ($6 for seniors). Please pay at STOP sign on Channel Drive. Dogs not allowed. There are restrooms and water at the parking area.

Directions: from Montgomery Drive, turn onto Channel Drive and follow the road in approximately  mile to the STOP sign. Pay fee or display State Park Pass. Drive 1 mile to the large parking lot.

California State Parks supports equal access. Prior to arrival, visitors with disabilities who need assistance should contact Bill Miller at 707-769-5652. 711, TTY, Relay Service

Read more about bioblitzes here:


Trione-Annadel State Park (View)
6201 Channel Drive
Santa Rosa, CA 95409
United States



Kid Friendly: Yes!
Dog Friendly: No
Wheelchair Accessible: No


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