4.8
(35)
804
hikers
104
hikes
Hiking in Trione-Annadel State Park offers access to a diverse landscape characterized by northern oak woodlands, grasslands, and chaparral. The park features rolling hills and volcanic rock formations, remnants of its geological past, providing varied topography. Central to the park is Lake Ilsanjo, a 26-acre man-made lake, which serves as a focal point for many routes. This ecological variety supports a wide array of wildlife and offers hikers ever-changing scenery.
Last updated: May 12, 2026
4
hikers
5.73km
01:42
170m
160m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
3.99km
01:07
130m
0m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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5.0
(1)
13
hikers
6.26km
01:46
130m
130m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
7
hikers
5.92km
01:45
180m
180m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
6
hikers
6.55km
01:56
170m
170m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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Trail around the southern perimeter of Annadel State Park to Bennet Mountain
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Get off the wide forest road onto the quieter hiking trails
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Lake Ilsanjo is a hidden gem in Annadel State Park: it's a small, quiet lake. There are many trails and even some swimming spots.
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Warren Richardson is the main, gradual gravel-paved fire road to the Lake Ilsanjo saddle from the north side of the park. Very pleasant riding in the shade of tall pine and fir trees.
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Lake Ilsanjo is a hidden gem in Annadel State Park! There are lots of trails that take you up to the lake. It is also a great spot for a swim!
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Cobblestone Trail is a great singletrack with lots of rocks and roots. This route is heavily trafficked, so keep your eyes peeled.
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Trione-Annadel State Park offers a wide selection of easy hiking trails. There are 29 easy routes available, making up a significant portion of the park's extensive trail system.
Easy hikes in Trione-Annadel State Park feature diverse terrain, including northern oak woodlands, open grasslands, and chaparral. You'll encounter rolling hills and volcanic rock formations, providing varied scenery without significant elevation challenges. Trails often loop around scenic areas like Lake Ilsanjo.
Yes, many easy trails in Trione-Annadel State Park are suitable for families. Routes like the Spring Lake Park – Spring Lake Park loop offer gentle paths and scenic views, perfect for outings with children. The park's diverse ecosystems also provide opportunities for wildlife spotting, which can be engaging for younger hikers.
Trione-Annadel State Park has specific regulations regarding dogs. Generally, dogs are permitted on paved roads and in developed areas, but not on unpaved trails or in the backcountry. It's always best to check the latest park rules on the official California State Parks website for current guidelines regarding pets: parks.ca.gov.
Easy hikes in Trione-Annadel State Park offer access to several notable natural features. You can explore around Lake Ilsanjo, a central attraction, or discover sections of the Cobblestone Trail, which hints at the park's industrial past. During the rainy season, seasonal waterfalls and streams add to the park's beauty.
The best time to visit Trione-Annadel State Park for easy hikes is from early spring to early summer, particularly April and May, when the park showcases vibrant wildflower displays around Lake Ilsanjo. Winter months bring seasonal waterfalls and lush greenery, while fall offers pleasant temperatures and changing foliage. Summers can be warm, so early mornings are recommended.
Yes, Trione-Annadel State Park features several excellent circular easy hiking routes. Popular options include the Lake Ilsanjo loop, which circles the scenic lake, and the Howarth Memorial Park – West Saddle Dam loop, offering varied parkland scenery.
The duration for easy hikes varies depending on the route and your pace. For example, the Spring Lake Park loop, at 2.3 miles (3.7 km), typically takes about 1 hour. Longer easy routes, like the Lake Ilsanjo loop (3.9 miles / 6.3 km), might take closer to 1 hour 45 minutes.
Yes, parking is available at various access points to Trione-Annadel State Park. The park is conveniently located near Santa Rosa, and specific trailheads often have designated parking areas. Always check park signage for any parking fees or restrictions.
Trione-Annadel State Park's diverse habitats support a variety of wildlife. On easy hikes, you might spot black-tailed deer, western gray squirrels, coyotes, and various bird species such as western scrub jays and wild turkeys. The Ledson Marsh, though seasonal, is known to host over 130 bird species.
The easy trails in Trione-Annadel State Park are highly rated by the komoot community, with an average score of 4.8 stars. Reviewers often praise the park's diverse ecosystems, the tranquility of Lake Ilsanjo, and the well-maintained, interconnected trail system that allows for customized, enjoyable walks.
Absolutely. The Lake Ilsanjo loop is a prime example, offering tranquil waterside views throughout its 3.9-mile (6.3 km) path. Many other trails also provide access to or scenic overlooks of the lake, which is a central feature of the park.


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