Trione-Annadel State Park

Phone Number

(707) 539-3911

Park Hours

8AM to Sunset.

Driving Directions to Trione-Annadel SP

The park is east of Santa Rosa and south of Highway 12 on Channel Drive via Montgomery Drive. 6201 Channel Drive Santa Rosa, California, 95409

Online reservations are not available for this park.

Bike Trails
Hiking Trails
Horseback Riding
Picnic Areas
Env. Learning/Visitor Center
Exhibits and Programs
Guided Tours
Interpretive Exhibits
Vista Point
Nature & Wildlife Viewing
Drinking Water Available

Celebrate First Day 2020 in Trione-Annadel State Park!
Join certified California Naturalist Carolyn Greene for a civilized New Year’s Day Hike – not too long, not too early, not too steep, not too fast. We’ll head up Steve’s S Trail to Richardson with a possible extension to Lake Ilsanjo.

3-5 miles, 450 feet elevation gain.

Wednesday, January 1, 2020
10 AM to about Noon
Richardson Trailhead Parking Lot
(end of Channel Drive)

Free event. Reservations not needed.
Pay day-use fee at stop sign.  Click here for more information!

Park Information:

House imageThe park, 60 miles north of San Francisco on the eastern edge of Santa Rosa offers miles of trails for hiking, mountain biking, and trail riding.

For wildflower lovers, Trione-Annadel State Park offers a great variety of flowers from early Spring until early Summer, especially on a hike around Lake Ilsanjo. The best months to see the park's wildflowers are April and May, but there are some plants in bloom as early as January and as late as September. 

Cyclist at the park

  • Dogs are not allowed on trails. Dogs are allowed on a leash under your control only on Channel Drive (a paved road) within the park.
  • Model Aircraft (“drones”)/Unmanned Aircraft Systems (UAS)/Glider Use is not allowed in the park per Bay Area District Order No. 660-16-036.
  • Electric-Assist or “E-bikes” are considered motorized vehicles and are not allowed in the park.

Fishing Lake Ilsanjo offers excellent fishing for black bass and bluegill. Black bass weighing nine pounds and more have been caught here. A purple plastic worm is a favored bait for the bass, while the bluegill favor garden worms, small crayfish, and grubs. If you are 16 years of age or older, you must have a California fishing license. Ledson Marsh dries up by late August or early September and so no fish are found there.

Location - Directions

Pretty Face imageThe park is east of Santa Rosa and south of Highway 12 on Channel Drive via Montgomery Drive. 6201 Channel Drive Santa Rosa, California, 95409
Latitude/Longitude: 38.4292 / -122.6236

Seasons/Climate/Recommended Clothing

Temperatures during the Summer are in the 80s and 90s. Wintertime highs are in the 50s.

Rainfall averages about 30 inches a year, most of it during the winter and early spring.

Snow is quite rare, and there is little fog.

Facilities and Activities

Canyon WR trail junction

There is no camping in the park. Fires, campstoves, and barbecues are not allowed.

Note that all plants and wildlife within the park are protected.  Collecting or destroying anything in the park, including mushrooms, is prohibited.

Purple Owl Clover Selena imageCampsites are available at the county campground at Spring Lake and at Sugarloaf Ridge State Park, about ten miles east of Annadel via Highway 12 and Adobe Canyon Road.

Horses and bicycles are allowed only on designated trails. Off-trail riding is not permitted.

Drinking water should be carried on the trails. The water in Hunter Springs is suitable for horses only.

Turret Spider imageMotor vehicles are allowed only on the entrance road and in the parking lot within the park.

Dogs are allowed only on Channel Drive and in the parking lot. They must be kept on leash at all times and are not allowed on the trails.

Lock your car and take your valuables with you. Don't Litter! If you bring it in, take it back out.

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