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Routes
United States
California
Orange County
Fullerton

Laguna Lake – Four Corners loop from Fullerton

Routes
United States
California
Orange County
Fullerton

Laguna Lake – Four Corners loop from Fullerton

Hard

4.7

(8543)

8,834

riders

Laguna Lake – Four Corners loop from Fullerton

03:29

52.1km

550m

Gravel riding

Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: May 9, 2026

Tips

Includes a segment in which cycling is not permitted

After 16.4 km for 275 m

Waypoints

A

Start point

Train Station

Get Directions

1

5.64 km

Laguna Lake

Highlight • Lake

There are wide packed dirt trails that take you right up to the edge of the lake, which gleams a deep azure blue. This is a phenomenal place to run.

Tip by

2

5.67 km

Laguna Lake

Highlight • Lake

This is a beautiful lake, definitely a pleasant spot for a small break.

Tip by

3

18.7 km

Twisted Tree in Carbon Canyon Regional Park

Highlight • Natural Monument

Carbon Canyon Regional Park is a great local park with a small lake and some nature trails featuring redwoods and the Carbon Canyon Creek. It connects to Chino Hills State Park.

Tip by

4

22.9 km

Telegraph Canyon Road

Highlight • Trail

Following the Telegraph Canyon Road is great for trail running. The old backcountry road starts near the Discovery Center in the western portion of Chino Hills State Park and leads …

Tip by

5

25.8 km

Telegraph Canyon Trail

Highlight (Segment) • Trail

Telegraph Canyon Trail is one of the most popular paths in the entire park. It leaves the visitor's center as a wide, smooth road and eventually narrows a bit, but …

Tip by

6

28.5 km

Four Corners

Highlight • Rest Area

Take a seat, have a snack and enjoy your shady spot. After the rest you can follow with Raptor Ridge Traill, North Ridge Trail, Bovinian Delight Trail or Telegraph Canyon Road.

Tip by

7

30.2 km

Andersen Bump

Highlight • Summit

Andersen Bump is a 482m high hilltop that rises above the city of Los Angeles in California.

It provides some wonderful views of the surrounding peaks that make up the …

Tip by

B

52.1 km

End point

Train Station

Loading

Way Types & Surfaces

Way Types

16.0 km

11.5 km

9.02 km

8.82 km

5.00 km

1.62 km

< 100 m

< 100 m

Surfaces

25.2 km

15.4 km

5.45 km

4.35 km

1.16 km

< 100 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 (480 m)

Lowest point (50 m)

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Weather

Powered by Foreca

Today

Sunday 12 July

29°C

18°C

0 %

Additional weather tips

Max wind speed: 13.0 km/h

to get more detailed weather forecasts along your route

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Description

If you're ready for a serious challenge on two wheels in Orange County, the Laguna Lake – Four Corners loop from Fullerton is a difficult gravel biking route that truly delivers. This 32.4-mile (52.1 km) ride packs in 1811 feet (552 metres) of elevation gain, taking around 3 hours and 29 minutes to complete. It's definitely for experienced riders seeking a demanding adventure with significant Fullerton Loop gravel biking difficulty and elevation gain.

What to expect on Laguna Lake – Four Corners loop from Fullerton

Expect a varied journey on this route, which blends urban and natural landscapes. You'll roll along wide, shaded, packed-dirt trails like sections of the Juanita Cooke Greenbelt Trail, tackle challenging singletrack, and navigate fire roads and rolling hills. The scenery shifts from the tranquil Laguna Lake to greenbelts and views of the West Coyote Hills. Keep an eye out for the Nora Kuttner Trail, which offers panoramic views from its “Top of the World” viewpoint, overlooking the Robert E. Ward Nature Preserve. This is a hard gravel ride requiring very good fitness and advanced riding skills; be prepared for some bumpy sections and potentially needing to push your bike on steeper parts.

Planning your visit

The Laguna Lake area serves as a convenient hub for this ride, offering amenities like picnic tables, bathrooms, and parking. Water and restrooms are also available at Laguna Lake at the north end if you're on the Juanita Cooke trail. Given the challenging nature of this route, ensure your bike is equipped with tires 35mm or larger, suitable for the mixed terrain. This route is a great option for advanced gravel biking trails in Orange County.

Trail details

  • Distance: 32.4 miles (52.1 km)
  • Elevation gain: 1811 feet (552 metres)
  • Difficulty: difficult
  • Estimated time: 3 hours and 29 minutes

Nearby routes

Hard

4.8

26

Four Corners – Telegraph Canyon Trail loop from Carbon Canyon Regional Park

02:43h

29.2km

500m

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