Turnbull Debris Basin – Turnbull Canyon loop from La Serna High School

Turnbull Debris Basin – Turnbull Canyon loop from La Serna High School

Hard

5.0

(6989)

15,807

riders

Turnbull Debris Basin – Turnbull Canyon loop from La Serna High School

03:59

48.6km

1,010m

Gravel riding

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: September 16, 2026

Tips

Includes a very steep uphill segment

You may need to push your bike.

After 35.2 km for 753 m

Waypoints

Start point

Parking

Get Directions

7.09 km

Turnbull Debris Basin

Highlight • Structure

As you hike near Turnbull Debris Basin, observe its crucial function in storing runoff and sediment, acting as a safeguard against downstream flooding and sedimentation, and protecting human life and …

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10.7 km

Whittier Hill

Highlight • Viewpoint

The graffiti-covered water tower at the top of Whittier Hill might not be the most alluring of landmarks, but take a minute to turn and look around: You have some …

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11.9 km

Puente Hills Preserve

Highlight • Trail

Just minutes from the city, The Puente Hills Preserve offers mountain bikers almost 4,000 acres of scenic trails to explore. Well-marked paths wind through native landscapes, presenting challenges for riders of every skill level.

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17.3 km

Turnbull Canyon

Highlight • Canyon

Ride through Turnbull Canyon and be rewarded with stunning views of Los Angeles County and surround yourself with a mix of natural beauty and historical intrigue. The road climbs with …

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17.8 km

View from Workman Hill

Highlight • Viewpoint

Conquer the challenge of Workman Hill in Puente Hills Preserve. The singletrack rewards your hard work with panoramic views at the summit.

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29.0 km

Shabarum Extension Trail

Highlight (Segment) • Viewpoint

Look for the Map Sign foe Extension Trail. Be careful as there are lots of switchbacks and corners. Don't speed on the downhill as you will be met with a 120 degree switchbacks.

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33.3 km

Puente Hills Preserve

Highlight • Forest

39.0 km

Puente Hills Preserve

Nature Reserve

45.0 km

View of La Habra Heights

Highlight (Segment) • Viewpoint

Climb up into the picturesque and rural community of La Habra Heights, known for large properties, many of which allow for agricultural activities such as horse keeping and avocado farming. …

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48.6 km

End point

Parking

Way Types & Surfaces

Way Types