Trione-Annadel State Park
Explore 5,000 acres of rolling hills, oak woodlands, and meadows with stunning views. Ideal for hiking, biking, and nature observation.
Highlights
Must-see attractions

Social
From TikTok & Reddit
Best Time
Wildflowers bloom vibrantly
Trione-Annadel State Park
Best Time
Wildflowers bloom vibrantly
Highlights
Must-see attractions
Explore 5,000 acres of rolling hills, oak woodlands, and meadows with stunning views. Ideal for hiking, biking, and nature observation.
"A beautiful park with incredible mountain bike trails and scenic views for all outdoor enthusiasts."
🚫 No Dogs on Dirt Trails
Respect the park's rule: dogs are prohibited on dirt trails to protect wildlife. :noentrysign:
☀️ Hydrate & Sun Protection
Bring plenty of water and sun protection, as many trails are exposed. :droplet: :sunwithface:
Highlights
Discover the most iconic attractions and experiences
Oak Woodlands & Wildflowers
Throughout the park
Wander through serene oak woodlands and discover vibrant fields of wildflowers, especially in spring.
Lake Ilsanjo
Central park area
A peaceful lake offering opportunities for fishing (with a license) and a scenic spot to pause during your exploration.
Mountain Biking Trails
Extensive trail network
Experience some of the best mountain biking in Sonoma County with a variety of trails for all skill levels.
Panoramic Views
Higher elevations
Hike or ride to higher points for breathtaking views of Santa Rosa and the surrounding Sonoma County landscape.
Plans like a pro.
Thinks like you
Planning Your Visit
Trail Etiquette & Restrictions
Beat the Heat & Crowds
Best Times
Insider Tips
from TikTok, Instagram & Reddit
🚫 No Dogs on Dirt Trails
Respect the park's rule: dogs are prohibited on dirt trails to protect wildlife.
:noentrysign:☀️ Hydrate & Sun Protection
Bring plenty of water and sun protection, as many trails are exposed.
:droplet: :sunwithface:👟 Wear Sturdy Footwear
Trails can be rocky and uneven; good hiking or biking shoes are essential.
:athletic_shoe:⏰ Go Early for Parking
Parking lots can fill up, especially on weekends. Arrive early for the best spots.
:car:Tips
from all over the internet
🚫 No Dogs on Dirt Trails
Respect the park's rule: dogs are prohibited on dirt trails to protect wildlife.
:noentrysign:☀️ Hydrate & Sun Protection
Bring plenty of water and sun protection, as many trails are exposed.
:droplet: :sunwithface:👟 Wear Sturdy Footwear
Trails can be rocky and uneven; good hiking or biking shoes are essential.
:athletic_shoe:⏰ Go Early for Parking
Parking lots can fill up, especially on weekends. Arrive early for the best spots.
:car:⚠️ Watch for Poison Oak
Be aware of your surroundings and identify poison oak to avoid irritation.
:warning:What Travellers Say
Reviews Summary
Visitors consistently praise Trione-Annadel State Park for its excellent mountain biking trails and beautiful natural scenery, including oak woodlands and wildflowers. While many appreciate the varied terrain and scenic views, some note the lack of modern restroom facilities and the strict 'no dogs on dirt trails' policy. The park is a popular spot, especially on weekends, and summer heat can be intense.
"A great trail for beginners. Brought 4 kids with me and thoroughly enjoyed it. No fees and available parking at the base."
Penisoni Jiko
"This state park had incredible mountain bike trails! It was super awesome to ride. Would be even better if they had bathrooms with flushing toilets and running water, but otherwise a beautiful park to visit."
Alika
"Excellent mtb riding. Trails are getting dusty but still great traction. Get out early because it's June and the heat will kick in by noon"
Carl Freeman
What People Like
What People Dislike
Frequently Asked Questions
🚇 🗺️ Getting There
Trione-Annadel State Park is located in Santa Rosa, California. Access points include parking lots off Lawndale Road and Cobblestone Trail.
Many visitors arrive by car, and it's a popular destination for those exploring Sonoma County.Public transportation options directly to the park are limited. It's generally recommended to have a car for easy access to the various trailheads and parking areas.
Key access points include the parking area off Lawndale Road for the Lawndale Trail and the Cobblestone Trailhead.
These offer different starting points for exploring the park's extensive trail system.Yes, parking is available at designated lots. Some lots, like the one at Cobblestone Trail, are free, while others may have a small fee.
Arriving early is advised, especially on weekends.While possible, biking to the park from Santa Rosa can be a significant ride depending on your starting point. The park itself is a prime destination for biking once you arrive.
🎫 🎫 Tickets & Entry
Some access points, like the Cobblestone Trailhead, offer free parking. However, other areas may have a small day-use fee, typical for California State Parks.
Trione-Annadel State Park is generally open from sunrise to sunset. It's always a good idea to check the official California State Parks website for any temporary closures or updated hours.
No advance ticket booking is typically required for day-use entry. You pay upon arrival at designated fee areas or enjoy free access at some trailheads.
The main restriction is that dogs are not allowed on the dirt trails. Visitors should also be aware of potential closures due to weather or maintenance.
Parking is available at various trailheads. Some lots are gravel and can fill up quickly on busy days.
🎫 🏞️ Onsite Experience
The Lawndale Trail is a popular, though challenging, 6-mile round trip hike with significant climbing.
Many other trails offer varied difficulty, from easy strolls through woodlands to more strenuous climbs with rewarding views.Absolutely! It's renowned for its extensive network of mountain biking trails, catering to intermediate and advanced riders.
Trails can be rocky and dusty, especially in summer.Restroom facilities can be limited, with some trailheads having no water or restrooms available.
It's advisable to bring your own water and be prepared for basic facilities.Visitors often spot deer grazing peacefully in the meadows.
You might also see various birds and other small wildlife. Remember to observe from a distance.Yes, some trails are suitable for families, offering a chance to enjoy nature. However, be aware of the terrain and the 'no dogs on dirt trails' rule.
🍽️ 🍽️ Food & Dining
No, there are no dining facilities within Trione-Annadel State Park. Visitors should plan to bring their own food and drinks for a picnic.
Santa Rosa offers a wide variety of restaurants, cafes, and grocery stores just a short drive from the park.
Picnicking is a great way to enjoy the park's scenery. Pack your own food and find a scenic spot to relax.
Bring plenty of water, especially during warmer months. Snacks and a packed lunch are recommended for longer hikes or rides.
The primary concern is proper waste disposal. Pack out everything you pack in to keep the park clean.
📸 📸 Photography
Capture the rolling hills, oak woodlands, and wildflowers, especially during the golden hours of sunrise and sunset.
Lake Ilsanjo also provides scenic photo opportunities.Nature photography, landscape shots, and wildlife photography are very popular.
Mountain bikers often capture action shots on the trails.Drone usage is generally restricted in California State Parks to protect wildlife and visitor experience. Check specific park regulations before flying.
Early morning and late afternoon offer the best light for photography, creating dramatic shadows and warm tones.
Yes, but always maintain a safe distance and avoid disturbing the animals.
Focus on capturing their natural behavior without intrusion.For Different Travelers
Tailored advice for your travel style
👨👩👧 Families with Kids
Consider starting with shorter, flatter trails to gauge your children's energy levels and interest. The visual appeal of wildflowers in spring can also captivate young minds. Ensure everyone wears appropriate footwear, as even easier trails can have uneven surfaces. It's a great place for kids to burn off energy and experience the outdoors in a beautiful setting.
🚵 Mountain Bikers
For an optimal experience, ensure your bike is well-maintained and carry essential repair tools. Familiarize yourself with trail etiquette, such as yielding to uphill traffic and being mindful of other park users. While the park offers a fantastic riding experience, remember that dogs are not permitted on the dirt trails. Consider renting a bike in Santa Rosa if you're visiting from out of town.
🚶 Hikers
Spring is a particularly beautiful time to hike, with wildflowers blanketing the hillsides. Weekday visits can offer a more peaceful experience, avoiding weekend crowds. Whether you're looking for a short nature walk or a full-day adventure, Trione-Annadel provides ample opportunities to explore its natural beauty.
Deep Dives
In-depth insights and expert knowledge
Exploring Trione-Annadel's Trails
When planning your route, consider the terrain and your fitness level. Many trails involve considerable uphill climbs, and during summer months, they can become quite dusty and exposed to the sun. It's crucial to carry ample water and wear appropriate footwear, as the trails can be rocky and uneven. The park's beauty is amplified by the changing seasons, with spring bringing a spectacular display of wildflowers and autumn offering pleasant temperatures for exploration.
Beyond the main trails, the park also features Lake Ilsanjo, a tranquil spot for fishing (with a valid license) and a peaceful respite during your outdoor adventures. The diverse ecosystems within Trione-Annadel, from meadows to woodlands, support a variety of wildlife, including deer, which are frequently spotted grazing. Always practice Leave No Trace principles to help preserve this natural gem for future visitors.
Best Practices for Mountain Biking
When hitting the trails, prioritize safety and trail etiquette. Always yield to uphill riders and hikers, and be aware of your surroundings to avoid collisions. Many riders recommend starting early in the morning to avoid the intense heat of the day and to secure parking, as lots can fill up quickly on weekends. Consider bringing a basic repair kit, as trailside fixes might be necessary on longer rides. The park's beauty, with its oak woodlands and open hillsides, makes for a stunning backdrop to any biking adventure.
For those looking to rent a mountain bike in Santa Rosa, there are several local shops that can equip you for your ride. Remember that dogs are not allowed on the dirt trails, so this is an activity best enjoyed without your canine companions. The park's popularity means that while you'll encounter other enthusiasts, the vast trail system usually allows for a sense of solitude and immersion in nature.
Wildlife and Nature Observation
Beyond larger mammals, the park's varied flora also attracts a range of bird species and smaller creatures. During spring, the meadows come alive with a vibrant display of wildflowers, creating a picturesque scene for photographers and nature enthusiasts alike. The presence of tadpoles in small ponds during certain times of the year also highlights the park's dynamic ecosystem. It's important to be aware of the natural environment, including the presence of poison oak, and to stay on designated trails to minimize impact.
While the park is a natural sanctuary, it's crucial to remember that it is a protected area. Visitors should adhere to park regulations, such as the prohibition of dogs on dirt trails, to help preserve the delicate balance of the ecosystem. By respecting the park's natural inhabitants and environment, visitors can ensure that Trione-Annadel remains a beautiful and thriving natural space for years to come.
Social
from TikTok, Instagram & Reddit