4.7
(31)
691
riders
24
rides
No traffic road cycling routes in Trione-Annadel State Park traverse a diverse landscape featuring northern oak woodlands, grasslands, and chaparral areas. The park's terrain includes hilly sections with varied elevation changes, offering engaging challenges and rewarding vistas. Lake Ilsanjo, a 26-acre man-made lake, is a central scenic landmark. Volcanic rock formations also contribute to the park's rugged beauty.
Last updated: May 30, 2026
8
riders
18.5km
01:13
140m
140m
Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.
7
riders
16.5km
01:18
130m
130m
Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.

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6
riders
24.7km
01:09
160m
160m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
3.5
(2)
47
riders
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
4.0
(2)
22
riders
Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.
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Popular around Trione-Annadel State Park
Well maintained paved trail that runs along the border of the reservoir. The trail is popular with walkers, runners, and cyclists, so make sure to be respectful to other trail users!
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The Santa Rosa Creek Reservoir is a popular outdoor destination in Santa Rosa. The reservoir was created by a nearby dam.
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Good sandwiches and a quiet set of picnic tables behind the store.
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Beautiful scenery, lots of vineyards, and a number of the roads are newly paved. Not long ago you could lose a filling on some of these roads.
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Excellent green hiking trail shared with bikes all through the urban area of Santa Rosa along the creek, without seeing any car traffic
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Leafy park along the west shore of the large Santa Rosa Creek Reservoir, with good running trails around the water and through the meadows and shaded groves
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Reservoir at the foot of Annadale State Park with a great trail system around the lake, connecting into the large park, and on trails into Santa Rosa along creeks.
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Shallow lake with wide sandy beach next to Spring Lake, with food concessions, showers
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There are over 20 dedicated no-traffic road cycling routes in Trione-Annadel State Park, offering a variety of distances and difficulty levels for you to explore.
The park's multi-use trails and fire roads, which are suitable for road cycling, feature mostly well-paved surfaces. However, due to the park's hilly topography and volcanic rock formations, you can expect varied elevation changes. Some segments within the broader trail network might be unpaved or present more challenging terrain, requiring good fitness or potentially dismounting.
Yes, Trione-Annadel State Park offers several easy road cycling routes perfect for families. For example, the Santa Rosa Creek Trail – Prince Greenway Park loop from Montgomery Village is an excellent option, primarily consisting of well-paved, easy-to-ride surfaces suitable for various fitness levels.
You'll encounter diverse natural beauty. A central attraction is Lake Ilsanjo, offering picturesque views. The park also boasts expansive northern oak woodlands, grasslands, and unique volcanic rock formations. During winter, seasonal streams and waterfalls can be seen, and in spring, vibrant wildflower displays are common.
Many of the no-traffic road cycling routes in the park are designed as loops, allowing you to start and finish at the same point. An example is the Swimming Beach – Santa Rosa Swimming Lagoon loop from Spring Lake Park, which offers a moderate challenge and scenic views.
Spring (for wildflowers) and fall (for pleasant temperatures and foliage) are generally ideal. Winter brings seasonal water features like streams and waterfalls, but some trails might be wetter. Summer can be warm, so early morning or late afternoon rides are recommended. Always check local weather conditions before heading out.
The area is highly rated by the komoot community, with an average score of 4.5 stars. Reviewers often praise the park's diverse landscapes, the tranquility of the no-traffic routes, and the rewarding vistas from its hilly terrain. The opportunity to cycle through ancient oak woodlands and past serene Lake Ilsanjo is frequently highlighted.
Yes, the park's hilly topography provides varied elevation changes, and from certain points along the trails, you can catch glimpses of Mount Hood, adding to the scenic rewards of your ride.
Trione-Annadel State Park has designated parking areas. For specific details on parking locations and any associated fees, it's advisable to check the official California State Parks website. Public transport options directly to the park may be limited, so planning your journey in advance is recommended.
While many routes are accessible, the interconnected trail system allows for longer rides with significant elevation gain. Some segments within the park's broader network can be challenging, requiring good to very good fitness. For a moderate challenge, consider the Santa Rosa Creek Reservoir loop from Montgomery Village, which features notable elevation changes.
Yes, the park features an interconnected trail system, including parts of the Bay Area Ridge Trail, which allows cyclists to combine various segments to create longer, customized rides. This flexibility lets you tailor your route to your desired distance and difficulty.
Many trails offer scenic beauty. The areas around Lake Ilsanjo are particularly picturesque. Additionally, routes that traverse the northern oak woodlands provide a beautiful canopy and a sense of immersion in nature. The Santa Rosa Swimming Lagoon – Santa Rosa Creek Reservoir loop offers varied scenery.


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