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Routes
Mountain biking trails
United States
California
Sonoma County
Santa Rosa

Lake Ilsanjo – Warren Richardson Trail loop from Santa Rosa North

Routes
Mountain biking trails
United States
California
Sonoma County
Santa Rosa

Lake Ilsanjo – Warren Richardson Trail loop from Santa Rosa North

Moderate

5.0

(4331)

12,863

riders

Lake Ilsanjo – Warren Richardson Trail loop from Santa Rosa North

02:42

36.2km

440m

Mountain biking

Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary. The starting point of the route is accessible with public transport.

Last updated: April 21, 2026

Tips

Includes a segment in which cycling is not permitted

After 28.3 km for 110 m

Waypoints

A

Start point

Train Station

Get Directions

1

9.65 km

Spring Lake Park

Highlight • Lake

Popular park east of town with a lake good for water sports and an adjacent lagoon for swimming

Tip by

2

9.97 km

Spring Lake Park

Highlight • Lake

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

Tip by

3

15.5 km

Lake Ilsanjo

Highlight • Lake

Lake Ilsanjo is a small quiet lake near the top of Canyon trail. A hidden gem for a break or a swim. It is much quieter than Santa Rosa Reservoir …

Tip by

4

15.7 km

Lake Ilsanjo

Highlight • Lake

Very pretty lake in the middle of Annadel State Park, great for a swim on a hot day. Access is best from Lake Trail with a small beach on the north-west side.

Tip by

5

20.5 km

Warren Richardson Trail

Highlight (Segment) • Trail

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 …

Tip by

6

26.2 km

Paved trail around reservoir

Highlight • Trail

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!

Tip by

7

26.7 km

Santa Rosa Creek Reservoir

Highlight • Lake

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.

Tip by

B

36.2 km

End point

Train Station

Loading

Way Types & Surfaces

Way Types

10.8 km

9.18 km

6.44 km

5.82 km

2.87 km

707 m

368 m

Surfaces

16.0 km

7.55 km

4.82 km

4.72 km

2.03 km

1.07 km

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (400 m)

Lowest point (40 m)

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Weather

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Today

Tuesday 19 May

31°C

8°C

0 %

Additional weather tips

Max wind speed: 24.0 km/h

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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4.0

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

02:32h

25.8km

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