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Routes
Mountain biking trails
United States
California
Sonoma County
Santa Rosa

Warren Richardson Trail – Lake Ilsanjo loop from Montgomery Village

Routes
Mountain biking trails
United States
California
Sonoma County
Santa Rosa

Warren Richardson Trail – Lake Ilsanjo loop from Montgomery Village

Hard

4.7

(2673)

12,270

riders

Warren Richardson Trail – Lake Ilsanjo loop from Montgomery Village

02:22

27.1km

440m

Mountain biking

Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is right next to a parking lot.

Last updated: April 21, 2026

Waypoints

A

Start point

Parking

Get Directions

1

1.73 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

2

14.0 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

3

18.2 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

18.4 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

24.5 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

6

24.8 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

B

27.1 km

End point

Parking

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Way Types & Surfaces

Way Types

11.8 km

9.36 km

5.06 km

543 m

355 m

Surfaces

9.85 km

6.78 km

6.57 km

2.76 km

778 m

420 m

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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 (420 m)

Lowest point (70 m)

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Weather

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Today

Tuesday 19 May

31°C

14°C

0 %

Additional weather tips

Max wind speed: 19.0 km/h

to get more detailed weather forecasts along your route

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

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Nearby routes

Moderate

4.0

55

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

02:32h

25.8km

510m

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