Trione-Annadel State Park: A Wild Paradise

Trione-Annadel State Park

Get away from it all in Trione-Annadel State Park, which unfurls its 5,092 pristine and largely undeveloped acres on the eastern edge of Santa Rosa, in the heart of Sonoma County.

Thanks to more than 40 miles of multi-use trails geared to hikers, mountain bikers, and horseback riders, you can explore much of this wonderful place on your own. 

Trione-Annadel’s hilly terrain supports seasonal streams, meadows, redwoods, grasslands, a 26-acre lake, dense chaparral, volcanic rock formations, and what many biologists consider to be a prime example of undisturbed northern oak woodlands.

This wide variety of ecosystems creates welcoming habitat for lots of wildlife, including the commonly seen black-tailed deer, western gray squirrel, skunk, opossum, coyote and raccoon, as well as the more rarely-seen bobcat and mountain lion.

Man-made Lake Ilsanjo holds bluegill, black bass, and largemouth bass. And in the park’s Ledson marsh, you might glimpse a red-legged frog, which is a threatened species.

Birds commonly sighted in Annadel include the western scrub jay, Steller’s jay, wild turkey, wood duck, acorn and pileated woodpeckers, pygmy owls, black phoebe, and dark-eyed junco.

Together, we can protect and preserve the beauty and natural resources of Sonoma County for generations to come. Check out our page on Sustainable Travel, and look over the Leave No Trace Seven Principles.

trione annadel state park

Wildflowers bloom as early as January and run into September, but the really magnificent displays tend to occur in spring. In April and May, you’ll find lupines, blue-eyed grass, popcorn flower, poppies, buttercups, bluedicks, shooting stars, iris, zigadene, hound’s tongue, linanthus, and more. Maybe you’ll even spot a fairy slipper orchid.

Plan your hiking visit by downloading the park brochure with trail map. Most of the trails connect, allowing you to design a hike to your liking. The elevation low-to-high chart can help you hone that hike to perfection.

Channel Trail, which only rises from 344 to 390 feet, is relatively flat—perfect for a hiking newbie or a low-energy day. Lawndale, rising to 1,236 feet from a mere 482, will provide a challenge for more experienced hikers.

Other ways to enjoy Trione-Annadel:

  • Bring a picnic. Tables are scattered about the Park, offering a range of lovely views (some tables are arranged around the lake).
  • Go fishing at Lake Ilsanjo. Anglers more than 16 years old must carry a California fishing license.
  • Check out Wymore Quarry. Follow Cobblestone Trail to Wymore Quarry where, at one time, cobblestones were taken away on a gravity-powered, narrow-gauge railway. In the late 19th century and into the early 1920s, cobblestones were quarried here for construction projects in San Francisco, both before and after the 1906 earthquake.
  • Use accessible tables. The quarry lot also contains an accessible portable restroom and one parking spot designated as accessible. 

Feeling hungry or thirsty after your excursion? Venture a little further into Sonoma Valley along scenic Highway 12 and visit popular wineries on the way, such as Kunde Family Winery, St. Francis Winery & Vineyards, Chateau St. Jean, Ledson Winery & Vineyards, or VJB Vineyards, Cellars & Marketplace.

Next, catch your breath beneath the shade trees in the eight-acre Sonoma Plaza, then tour the surrounding National Historic Landmark adobe buildings designed in 1834 by the Mexican Governor Mariano Vallejo.

Lunch is calling now, and the longtime classic, French-country the girl & the fig on the square is a delight, for seasonal plates like duck egg ravioli with spring mushrooms, onion crema, green garlic, spring peas and baby carrots sprinkled in smoked paprika.

Find more info about parks, things to do, and hotels & lodging in Sonoma County.

Written by Sonoma Insider Suzie Rodriguez.

You Might Also Like

handmade pizza at Glen Ellen Star
Trip Itineraries

As a Sonoma local, I’ve had the pleasure of experiencing Sonoma County’s finest offerings and generally end up with the…

Movie Prop Car On Display at Francis Ford Coppola Winery in Occidental
Activities

As you meander the wee 60-yard block of downtown, strolling its wooden sidewalks past 19th-century, false-front buildings, you’ll feel as…

Winter scenery at Luther Burbank in Sebastopol CA
Outdoor Activities

Lush greenery, foggy coastlines, seasonal harvests and unique wildlife sightings – Sonoma County in winter is a place where visitors…

Hot air balloon ride in sonoma county
Sightseeing & Tours

Without a doubt, Wine Country is one of the world’s most breathtaking regions to travel through whether you are looking…

Girls Getaway in Sonoma County
Food & Wine

Winter might be considered the off-season for many of the world’s hottest travel destinations, but a Wine Country visit between…

Pig at Charlie's Acres
Sustainable Travel

Need a pick-me-up? These nonprofits offer ways to spend time with cute animals — you could even try some goat…

Yellow wildflowers covering field
Outdoor Activities

Springtime in Sonoma County is hard to beat! Plan ahead with our weekend-by-weekend, month-by-month collection of popular experiences — from…

Wingo, California, Sonoma County’s Ghost Town, photographed by @chrisjkam
Outdoor Activities

Traveling mindfully to Sonoma County allows us to have experiences that can be savored in a place focused on and…

Tolay Lake Regional Park
Outdoor/Nature

More than (just) a premier Wine Country destination, Sonoma County’s myriad of options allow travelers to connect with the destination…

Couple at beach with dog
Outdoor Activities

Find hidden gems, outdoor adventures and more with tips from those who know the coast better than anyone: The locals….

See What’s Happening

Share your experience using #SonomaCounty or #LifeOpensUp