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United States
California
Los Angeles County

Diamond Bar

The best MTB trails around Diamond Bar

4.9

(35)

349

riders

20

rides

Mountain biking around Diamond Bar offers diverse terrain across rolling hills and canyons in eastern Los Angeles County. The region provides access to extensive trail networks within local parks like Chino Hills State Park and Carbon Canyon Regional Park. These areas feature a mix of fire roads, singletrack paths, and varied elevation changes, catering to different skill levels. The landscape is characterized by natural features such as oak and sycamore trees, with views of the San Gabriel Mountains.

Best mountain bike trails around Diamond Bar

  • The most popular mountain bike trail is Telegraph Canyon Trail, a 14.0 miles (22.5 km) trail that takes 2 hours 6 minutes to complete. This moderate route offers scenic views within Chino Hills State Park.
  • Another top favourite among local mountain bikers is Telegraph Canyon and South Ridge Loop, a moderate 16.4 miles (26.4 km) path. This route provides challenging climbs and expansive views across the park's varied terrain.
  • Local mountain bikers also love the Telegraph Canyon Trail – Four Corners loop from Carbon Canyon Regional Park, a 19.2 miles (30.9 km) trail leading through rolling hills and natural parkland, often completed in about 2 hours 50 minutes.
  • Mountain biking around Diamond Bar is defined by rolling hills, canyons, and park trails, with options for easy, moderate, and difficult routes. The network includes fire roads and singletrack paths suitable for various ability levels.
  • The routes in Diamond Bar are highly rated by the komoot community with an average score of 4.7 stars from more than 40 reviews. More than 400 mountain bikers have used komoot to explore Diamond Bar's varied terrain.

Last updated: May 1, 2026

4.8

(5)

45

riders

#1.

Telegraph Canyon Trail

22.5km

02:07

360m

360m

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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Moderate

4.7

(6)

32

riders

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate
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Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

Moderate

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy

Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.

Hard
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Popular around Diamond Bar

Hiking around Diamond Bar

Road Cycling Routes around Diamond Bar

Cycling around Diamond Bar

Running Trails around Diamond Bar

Gravel biking around Diamond Bar

Tips from the Community

mtm05005
June 27, 2025, Four Corners

This is the intersection of five trails: Raptor Ridge Trail, North Ridge Trail, Bovinian Delight Trail or Telegraph Canyon Road. There are also some boards with information about the trails and a restroom.

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You can cycle across the top of the dam, which was constructed in 1928 to help control flooding in the region. It stands at 147 feet high, and today supports a myriad of outdoor recreation activities on the reservoir.

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Alex
June 10, 2025, Faultline Trail

The Faultline Trail is a mix of dirt singletrack and fire road sections. There are some short, steep climbs and fast descents with loose gravel in places. It is a blue trail with a few sections that may challenge newer riders due to ruts, roots, and tight turns. This trail can get busy with runners and hikers on weekends as well.

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Alex
June 10, 2025, Scully Ridge Trail

The Scully Ridge Trail is 9.7 mile hiking and biking trail. During rainy season there can be waterfalls and of course, great views.

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Great view of the Puddingstone Reservoir, a 250-acre man-made body of water. There is a road that runs along the perimeter of the reservoir and there is a spot to pull off the road to get a close up view of the water.

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This area is designated as a wildlife sanctuary for rare and endangered wildlife. It has about 4,500 acres of wild space and open land.

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Matthew
February 5, 2024, View of Yorba Linda

This is a cool, panoramic overlook with a placard off the side of the South Ridge Trail. The overlook is situated over the city and neighborhoods of Yorba Linda.

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Both the trails here are packed dirt double track. You can follow the North Ridge Trail between Gilman and Four Corners or descend into Telegraph Canyon via the Sycamore Trail.

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Frequently Asked Questions

How many mountain bike trails are available around Diamond Bar?

There are over 25 mountain bike trails around Diamond Bar, offering a diverse range of options for riders of all skill levels. These routes traverse rolling hills, canyons, and local parks, providing varied terrain and scenic views.

Are there mountain bike trails suitable for beginners in Diamond Bar?

Yes, Diamond Bar offers several easy mountain bike trails perfect for beginners. For example, the Puddingstone Reservoir Dam loop from Frank G. Bonelli Regional Park is an easy 12.4 km route. The region also features paved paths and smoother singletrack options like the Tinkerbell Trail, which is considered 'green' difficulty.

What are some challenging mountain bike routes for experienced riders?

For experienced riders seeking a challenge, the area offers routes with significant elevation changes and longer distances. While most routes are moderate, some sections within Chino Hills State Park, such as the 16.4-mile loop mentioned in the region research, can involve up to 3,000 feet of elevation gain, requiring good fitness. The Telegraph Canyon and South Ridge Loop is a moderate route with challenging climbs.

Are there family-friendly mountain bike trails in Diamond Bar?

Yes, many trails in Diamond Bar are suitable for families. Easy routes like the Puddingstone Reservoir Dam loop offer a gentle ride. Additionally, the Bud Turner Trail, which follows Laguna Lake's edge, is a multi-use path that is generally accessible and offers scenic views for a pleasant family outing.

What natural features and viewpoints can I expect to see along the trails?

The trails around Diamond Bar offer diverse natural features and stunning viewpoints. You can expect to see rolling hills, canyons, and views of the San Gabriel Mountains. Elevated points like Summitridge Park and the Peterson Pantera trail offer spectacular vistas, especially at sunset. Trails often run alongside natural elements such as Carbon Canyon Creek, with indigenous vegetation like coast live oaks and sage leaf rock roses. A notable spot for facilities and access to multiple trails is Four Corners within Chino Hills State Park.

Are there any specific permits required for mountain biking in the area?

Mountain biking in Chino Hills State Park, a major draw near Diamond Bar, generally requires a day-use fee or a California State Parks Pass for vehicle entry. It's always best to check the official California State Parks website for the most current information regarding fees and any specific permit requirements for trails within the park. Frank G. Bonelli Regional Park may also have entry fees.

What is the best time of year to go mountain biking in Diamond Bar?

The Diamond Bar area is generally pleasant for mountain biking for much of the year. Spring and fall offer mild temperatures, making them ideal. Winter can also be good, though some trails might be muddy after rain. Summers can be hot, so early morning or late afternoon rides are recommended during warmer months to avoid peak heat.

Where can I find parking for mountain bike trails in Diamond Bar?

Many trailheads in and around Diamond Bar offer parking. For trails within Chino Hills State Park, designated parking areas are available, though a day-use fee may apply. Carbon Canyon Regional Park and Frank G. Bonelli Regional Park also provide parking facilities. It's advisable to check specific park websites for detailed parking information and any associated costs.

What do other mountain bikers enjoy most about the trails in Diamond Bar?

The mountain bike trails around Diamond Bar are highly rated by the komoot community, with an average score of 4.7 stars from over 40 reviews. Riders frequently praise the diverse terrain, ranging from smooth paths to challenging climbs, and the expansive scenic views, particularly within Chino Hills State Park. The well-maintained trails and the tranquil escape from city life are also often highlighted.

Are there any loop mountain bike trails in Diamond Bar?

Yes, there are several excellent loop mountain bike trails in the Diamond Bar area. A popular option is the Telegraph Canyon Trail – Four Corners loop from Carbon Canyon Regional Park, which is a 30.9 km route. Another favorite is the Telegraph Canyon and South Ridge Loop, offering varied terrain and expansive views.

Can I spot any wildlife while mountain biking in Diamond Bar?

Yes, the natural areas around Diamond Bar are home to various wildlife. While riding, you might observe white-tailed deer, Virginia opossums, or red-tailed hawks. The diverse ecosystems, including oak and sycamore trees, provide habitats for these animals, offering a chance to connect with nature during your ride.

Are there any trails that connect to other parks or areas?

The trail network around Diamond Bar is quite interconnected. For instance, Carbon Canyon Regional Park, which features the Carbon Canyon Regional Park itself, connects to the broader trail system of Chino Hills State Park. This allows for longer rides and exploration across multiple natural areas, such as the Gilman Peak loop from Brea, which traverses Carbon Canyon Regional Park.

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