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Routes
Mountain biking trails
United States
California
Los Angeles County
Los Angeles

Sullivan, Yedvarts, Cheney & Backbone Loop

Hard

4.8

(3586)

18,239

riders

Sullivan, Yedvarts, Cheney & Backbone Loop

03:31

34.0km

1,000m

Mountain biking

This difficult 21.1-mile mountain bike loop in Topanga State Park offers challenging terrain, technical descents, and panoramic canyon views

Last updated: February 26, 2026

Waypoints

A

Start point

Get Directions

1

10.2 km

Farmer Ridge Fire Road

Highlight (Segment) • Trail

Easy pedaling on that great fire road. Spectacular views!

Tip by

2

21.0 km

The Hub (Topanga State Park)

Highlight • Viewpoint

The perfect spot for a snack. Take a seat and enjoy the pretty views over the Santa Monica Mountains.

Tip by

3

29.9 km

Josepho Spur Trail

Highlight (Segment) • Trail

If you enjoy steep trails, you will have fun on Josepho.

Tip by

B

34.0 km

End point

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Way Types & Surfaces

Way Types

23.2 km

6.03 km

4.80 km

Surfaces

13.0 km

11.5 km

5.91 km

2.67 km

740 m

211 m

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Elevation

Elevation

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

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Weather

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Today

Friday 8 May

19°C

14°C

0 %

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Max wind speed: 16.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it typically take to complete the Sullivan, Yedvarts, Cheney & Backbone Loop?

This challenging mountain bike loop generally takes around 3.5 hours to complete, though experienced riders might finish it in 2-3 hours. Given its length and technical sections, plan for a substantial ride.

Is this mountain bike loop suitable for beginners?

No, this loop is generally considered Intermediate/Difficult or a Hard mountain bike ride. It requires very good fitness and advanced skills due to its length, significant elevation gain, and technical sections like rocky descents and rock stairs. Beginners should look for easier trails.

Where can I park to access this trail?

The Sullivan Fire Road is a common starting point for this loop. Parking is typically available near trailheads in the Santa Monica Mountains, but specific parking details can vary. It's advisable to check local regulations and parking availability before your visit.

What kind of terrain can I expect on this mountain bike loop?

The loop offers a diverse experience with a mix of fire road climbing and technical singletrack descending. You'll encounter sections like the Farmer Ridge Fire Road, the rocky and rutted descent of Yedvart's, and the rock stairs on Cheney. Parts of the Backbone Trail within the loop can also be overgrown and technical.

What are the main points of interest or scenic viewpoints along the route?

Riders can enjoy fantastic views of the surrounding canyons and peaks throughout the ride. A notable highlight is The Hub (Topanga State Park), a popular waypoint offering great views over the Santa Monica Mountains. You'll also get views of the Valley from Mulholland and experience the diverse scenery of the Santa Monica Mountains.

Is the Sullivan, Yedvarts, Cheney & Backbone Loop dog-friendly?

As this trail is largely within Topanga State Park and other areas of the Santa Monica Mountains, dogs are generally permitted on leash on fire roads and some designated trails. However, specific singletrack sections may have restrictions. Always check current park regulations regarding dogs before heading out.

What is the best time of year to ride this trail?

The Santa Monica Mountains generally offer good riding conditions year-round, but spring and fall are often preferred for cooler temperatures and vibrant scenery. Summers can be very hot, so early morning rides are recommended. Winters are usually mild but can bring rain, making some sections muddy.

Are there any permits or entrance fees required for this trail, especially since it's in Topanga State Park?

While the trail passes through Topanga State Park, there are typically no specific permits required for mountain biking on the main trails themselves. However, some parking areas within or near state parks may require a day-use fee. It's always best to check the official Topanga State Park website for the most current information on fees and regulations.

Does this loop connect with other trails in the area?

Yes, this loop is a great way to link up various trails in the Santa Monica Mountains. It incorporates significant sections of the Backbone Trail, Sullivan Fire Road, and the Josepho Spur Trail. You'll also traverse parts of Rogers Road Trail, Mulholland Drive, and Cheney Ranch Road, among others.

What are the most technical sections of this trail that riders should be aware of?

Be prepared for the Yedvart's descent, which is described as 'super fun, kinda steep' with plenty of rocks and ruts. The Cheney section features notable rock stairs that require careful navigation. Additionally, some parts of the Backbone Trail within this loop can be overgrown and technical, potentially requiring you to push your bike.

What should I pack or prepare for a ride on this loop?

Given the trail's length and difficulty, it's crucial to bring plenty of water, snacks, and essential bike repair tools. A helmet, gloves, and appropriate mountain biking attire are a must. Consider a first-aid kit, sun protection, and a fully charged phone. Due to the diverse terrain, a full-suspension mountain bike is highly recommended.

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Trail Reviews

jhaygood
July 3, 2023, Up Sully Ridge & Down Backbone

Route up Sullivan Ridge is fire road, coming back down Backbone is single track. I was riding an emtb. In June of '23 Backbone is over grown. You'll definitely want to be wearing long pants and shirt, gloves, etc. The drop down Into the valley at mile 16 - Josepho Drop - is very difficult, steep and very eroded. I had to walk parts. Definitely above my intermediate level skills and 65 year old body!

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