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United States
California
Sonoma County

Trione-Annadel State Park

The best MTB trails in Trione-Annadel State Park

4.7

(33)

617

riders

33

rides

Mountain biking in Trione-Annadel State Park offers a network of trails through oak woodlands, open grasslands, and around Lake Ilsanjo. The park features rolling hills and varied terrain, providing diverse riding experiences. Riders can expect a mix of singletrack and wider paths, with some sections presenting technical challenges. The landscape is characterized by its natural, undeveloped feel, with elevation changes throughout.

Best mountain bike trails in Trione-Annadel State Park

  • The most popular mountain bike trail is Cobblestone, Canyon, Marsh, Ridge, South Burma, & Warren Richardson Trails loop, a 16.0 miles (25.8 km) trail that takes 2 hours 32 minutes to complete, traversing diverse park landscapes.
  • Another top favourite among local mountain bikers is Warren Richardson Trail – Lake Ilsanjo loop from Spring Lake Park, a difficult 18.4 miles (29.6 km) path. This route features significant climbs and descents through wooded areas and offers views of Lake Ilsanjo.
  • Local mountain bikers also love the Ridge Trail – Warren Richardson Trail loop from Spring Lake Park, a 22.8 miles (36.6 km) trail leading through dense forests and open ridges, often completed in about 3 hours 33 minutes.
  • Mountain biking in Trione-Annadel State Park is defined by oak woodlands, open grasslands, and the presence of Lake Ilsanjo. The network offers options for different ability levels, from moderate paths to more advanced routes.
  • The routes in Trione-Annadel State Park are highly rated by the komoot community with an average score of 4.5 stars from over 30 reviews. More than 590 mountain bikers have used komoot to explore Trione-Annadel State Park's varied terrain.

Last updated: May 11, 2026

4.0

(4)

55

riders

#1.

Cobblestone, Canyon, Marsh, Ridge, South Burma, & Warren Richardson Trails loop

25.8km

02:32

510m

520m

This 16.1-mile mountain biking loop in Trione-Annadel State Park offers a moderate challenge through diverse forests, meadows, and past Lake

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Moderate

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

Moderate
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Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

Hard

5.0

(2)

17

riders

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.

Moderate

Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.

Moderate
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Popular around Trione-Annadel State Park

Hiking in Trione-Annadel State Park

Cycling in Trione-Annadel State Park

Road Cycling Routes in Trione-Annadel State Park

Running Trails in Trione-Annadel State Park

Tips from the Community

mtm05005
May 13, 2025, Ridge Trail

The Ridge Trail is a popular trail in Trione-Annadel State Park. The flowy single track follows a ridge as it leads you up some switchbacks.

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The Warren Richardson Trail is a gravel and dirt path that begins at the main entrance on the eastern side of the park. It ascends to the summit of the main ridge, then gently descends to the scenic Lake Ilsanjo, located near the park's center. It's one of the most scenic trails the park offers.

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Trail around the southern perimeter of Annadel State Park to Bennet Mountain

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Tyler Sanders
August 22, 2023, Ridge Trail

While the trail does feature some rocky sections, they are not overly challenging. Along the way, you'll be treated to picturesque mountain views, and there's even a chance of encountering turkeys and other forms of wildlife along the way.

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This trail begins by branching off Schultz Road, with a well-marked sign indicating Schultz Treadhead. It starts with a gradual incline on a partially shaded path, transitioning to a more open terrain and becoming somewhat rockier. Along the way, you'll find a convenient picnic bench, providing a pleasant spot to take a break.

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The trail maintains a steady and consistent incline as it passes through a combination of shaded sections and open areas. Springtime is the prime season to explore, as the wildflowers are in full bloom and the weather provides an optimal temperature.

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Tyler Sanders
August 22, 2023, Marsh Trail

The trail provides a balanced blend of open spaces and shaded areas, featuring a smooth dirt terrain. Additionally, a comfortable park bench is available along the way, allowing you to take a break or simply unwind amidst the natural surroundings.

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Within this park, there are extensive miles of trails available for hiking, biking, and horseback riding. The landscape comes alive with an array of wildflowers, particularly vibrant during spring. Notably, Lake Ilsanjo stands as a park highlight, offering opportunities for fishing and often attracting anglers.

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Frequently Asked Questions

How many mountain bike trails are available in Trione-Annadel State Park?

Trione-Annadel State Park offers a network of over 25 mountain bike trails, ranging from moderate to difficult, providing diverse riding experiences through oak woodlands and grasslands.

Are there mountain bike trails suitable for beginners in Trione-Annadel State Park?

While most trails are moderate to difficult, there is at least one easy mountain bike route available. Riders new to the sport or looking for a less strenuous ride should check trail descriptions carefully.

What kind of trails are available for advanced mountain bikers?

Advanced mountain bikers will find plenty of challenging options, with 8 difficult routes featuring significant climbs and technical sections. Trails like the Ridge Trail loop from Lawndale offer demanding terrain and elevation changes.

Are there family-friendly mountain bike routes in Trione-Annadel State Park?

For families with some mountain biking experience, some of the moderate trails can be enjoyable. However, given the park's general terrain, it's advisable to review trail difficulty and length to ensure it suits all family members. There is one easy route, but most are moderate to difficult.

Are permits required for mountain biking in Trione-Annadel State Park?

No specific permits are required for mountain biking within Trione-Annadel State Park, beyond standard park entrance fees if applicable. Always check the official park website for the most current regulations before your visit.

Where can I park for mountain biking in Trione-Annadel State Park?

Parking is available at various access points to Trione-Annadel State Park. Popular starting points often include areas near Spring Lake Park or Lawndale, which provide direct access to the trail network.

What is the best time to mountain bike in Trione-Annadel State Park?

The best time to mountain bike is typically during the spring and fall when temperatures are mild and the landscape is vibrant. Summers can be hot, and winter months may bring rain, affecting trail conditions. Always check local weather and trail conditions before heading out.

Can I find loop mountain bike trails in Trione-Annadel State Park?

Yes, many of the mountain bike routes in Trione-Annadel State Park are designed as loops, allowing for varied scenery without retracing your path. Examples include the popular Cobblestone, Canyon, Marsh, Ridge, South Burma, & Warren Richardson Trails loop and the Ridge Trail – Warren Richardson Trail loop from Spring Lake Park.

What can I see along the mountain bike trails in Trione-Annadel State Park?

Along the trails, you can experience diverse landscapes including oak woodlands, open grasslands, and views of Lake Ilsanjo. Key trails like Warren Richardson Trail, Canyon Trail, and Ridge Trail offer scenic riding through the park's natural beauty.

What do other mountain bikers enjoy the most about mountain biking in Trione-Annadel State Park?

The area is highly rated by the komoot community, with an average score of 4.5 stars from over 30 reviews. Riders often praise the park's natural, undeveloped feel, the varied terrain, and the extensive network of trails that cater to different skill levels.

Are there any cafes or amenities near Trione-Annadel State Park for cyclists?

Trione-Annadel State Park is located near Santa Rosa, which offers a variety of cafes, restaurants, and bike shops where cyclists can refuel and find supplies. It's recommended to plan your stops in Santa Rosa before or after your ride, as amenities are limited within the park itself.

What should I bring for mountain biking in Trione-Annadel State Park?

It's essential to bring plenty of water, especially on longer rides or during warmer months, as well as snacks, a helmet, appropriate safety gear, and a basic bike repair kit. Sunscreen and layers of clothing are also recommended due to varying temperatures and sun exposure.

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