Trione-Annadel State Park
Trione-Annadel State Park offers over 5,500 acres of rolling hills, wildflower-filled meadows, and oak woodlands in Sonoma County. Popular for hiking, mountain biking, and horseback riding, the park features scenic vistas, historic sites, and abundant wildlife, making it a favorite destination for outdoor enthusiasts year-round.
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Visiting with Dogs
Dogs allowed only on paved areas, not trails; must be leashed at all times. No dogs on dirt roads or backcountry.
Visitor Tips & Reviews
What Visitors Say
Visitors love Trione-Annadel’s scenic trails, wildflowers, and peaceful atmosphere, making it a top spot for hiking, biking, and enjoying nature near Santa Rosa.
Tips from Visitors
- Wear sturdy shoes for rocky trails.
- Bring plenty of water.
- Watch for poison oak.
- Arrive early for parking.
- Dogs not allowed on trails.
- Check for seasonal trail closures.
Amenities
Nearby Attractions
Explore these attractions near Trione-Annadel State Park:
- Spring Lake Regional ParkA popular regional park adjacent to Trione-Annadel, featuring a lake for boating, swimming lagoon, and picnic areas.1 mile away
- Charles M. Schulz MuseumA museum dedicated to the creator of Peanuts, located in Santa Rosa and featuring exhibits on Schulz’s life and work.7 miles away
- Sonoma ValleyA renowned wine region offering vineyards, tasting rooms, and scenic drives just southeast of the park.10 miles away
Things to Do at Trione-Annadel State Park
Camping at Trione-Annadel State Park
No camping at Trione-Annadel SP; try nearby Spring Lake Regional Park for camping options and amenities.
Hiking Trails
Trione-Annadel State Park offers scenic day hikes through rolling hills, oak woodlands, and vibrant wildflower meadows. Trails range from easy to challenging, with popular routes like the Lake Ilsanjo Loop. Hikers frequently enjoy peaceful forested paths, panoramic views, and opportunities to spot wildlife. The park is well-maintained and provides a tranquil escape, especially beautiful in spring when wildflowers are in bloom.
Lake Trail
EasyA scenic trail circling Lake Ilsanjo, popular for birdwatching and gentle walks.
Spring Creek Trail
ModerateA shaded trail following Spring Creek, offering wildflowers and redwood groves.
Ridge Trail
ModerateA ridge-top trail with panoramic views of Sonoma Valley and wildflower displays in spring.
Rough Go Trail
ChallengingA rocky, technical trail popular with experienced hikers and mountain bikers.
Directions
From Highway 12 in Santa Rosa, take Montgomery Drive east, turn right onto Channel Drive, and follow signs to the park entrance.
Contact & Info
Frequently Asked Questions
What activities can I do at Trione-Annadel State Park?
Visitors enjoy hiking, mountain biking, trail running, and horseback riding on over 40 miles of trails. Fishing is also popular at Lake Ilsanjo.
Are dogs allowed in Trione-Annadel State Park?
Dogs are not allowed on trails or in the backcountry, but they are permitted in the parking areas and on paved roads, on leash.
Is there an entrance fee for Trione-Annadel State Park?
Yes, there is a day-use parking fee. As of 2024, the fee is $7 per vehicle. Walk-in and bike-in access is free.
Are there picnic areas or facilities in the park?
Picnic tables and restrooms are available at the main entrance and near Lake Ilsanjo. Drinking water is limited, so bring your own.
What is the best time to visit Trione-Annadel State Park?
Spring and fall offer mild weather and wildflowers. Summer can be hot, so visit early in the day. Trails may be muddy in winter.
Is camping allowed at Trione-Annadel State Park?
No, camping is not permitted. The park is open for day use only. Nearby state and regional parks offer camping options.