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Routes
Mountain biking trails
United States
California
San Bernardino County
Big Bear Lake

Big Gravel Loop

Hard

4.6

(8424)

17,835

riders

Big Gravel Loop

03:55

44.0km

1,370m

Mountain biking

If you are seeking a difficult mountain biking challenge, the Big Gravel Loop offers a substantial workout over 27.3 miles (44.0 km). You will gain 4495 feet (1370 metres) of elevation, with an estimated duration of 3 hours and 54 minutes. The route takes you through varied terrain, from gravel…

Last updated: April 23, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

San Bernardino National Forest

Waypoints

A

Start point

Parking

Get Directions

1

10.3 km

Skyline Drive

Highlight (Segment) • Trail

This is the gravel road that parallels the Skyline Trail. The grade is smooth and the views are amazing.

Tip by

2

13.4 km

Clarks Grade

Highlight (Segment) • Trail

This gravel road can be ridden in both directions. Sandy and rocky spots will keep you on your toes.

Tip by

3

37.7 km

Pirates Trail Trailhead

Highlight • Trail

This is the entrance of the beginner-friendly Pirates Trail that will bring you to the top of Snow Summit. Then take Going Green for an easy downhill option. If you …

Tip by

B

44.0 km

End point

Parking

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Way Types & Surfaces

Way Types

33.2 km

6.25 km

2.70 km

1.71 km

< 100 m

Surfaces

29.7 km

11.1 km

3.06 km

< 100 m

< 100 m

< 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 (2,460 m)

Lowest point (1,520 m)

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Weather

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Friday 3 July

24°C

4°C

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Frequently Asked Questions

What is the terrain like on the Big Gravel Loop?

The route is primarily gravel, making it suitable for gravel bikes, but it also features a mix of singletrack and paved sections. Expect varied conditions, including rugged jeep trails, occasional washboards, and sandy traps. Some technical sections with rocks and roots may require dismounting. Approximately 70% of the 42-mile route is unpaved.

Where can I park to access the Big Gravel Loop?

While there isn't one single designated parking lot for the entire loop, many riders start near the Big Bear South Shore area. A notable access point mentioned is the Pirates Trail Trailhead, which is part of the network.

What is the best time of year to ride the Big Gravel Loop?

The best time to ride is typically from late spring through early fall (May to October) when the weather is mild and the trails are clear of snow. During these months, you can enjoy seasonal wildflowers and optimal riding conditions. Winter riding can be challenging due to snow and cold temperatures at higher elevations.

Do I need any permits or pay an entrance fee for this trail?

The Big Gravel Loop is located within the San Bernardino National Forest. While there isn't a specific permit required for mountain biking the trail itself, some areas within the National Forest may require an Adventure Pass for parking at certain trailheads. It's always best to check the latest regulations with the San Bernardino National Forest service before your visit.

Is the Big Gravel Loop suitable for beginners?

No, this loop is generally considered an intermediate to hard mountain bike ride. It requires good to very good fitness and advanced riding skills due to significant elevation changes, steep grades (up to 45.3% in some sections), and technical terrain. Beginners may find it overly challenging.

What kind of views can I expect along the route?

You'll be treated to expansive and diverse scenery throughout the loop. Expect breathtaking views of Big Bear Lake and distant mountain ranges, including Mount San Gorgonio. The trail winds through dense pine forests, manzanita, and buckthorn. The views from Skyline Drive are particularly renowned, offering panoramic vistas.

Does the trail intersect with other well-known paths?

Yes, the Big Gravel Loop integrates with and provides access to numerous other popular Big Bear trails. You'll encounter sections of the Skyline Trail, Radford Truck Trail, Clark's Grade, Knickerbocker Road 2N08, Fern Trail, and Pineknot Trail 1E01, among others, allowing for customized and extended rides.

Is the Big Gravel Loop dog-friendly?

Dogs are generally allowed on trails within the San Bernardino National Forest, including the Big Gravel Loop, but they must be kept on a leash at all times. Please remember to pack out any waste to keep the trails clean for everyone.

What are some notable highlights or points of interest along the way?

Key highlights include the scenic Skyline Drive, known for its incredible views, and challenging sections like Clarks Grade. The Pirates Trail Trailhead is also a well-known access point. The route offers a comprehensive tour of the Big Bear South Shore, combining gravel roads with singletrack sections.

What should I bring for a ride on this loop?

Given the trail's difficulty and high-altitude sections, it's crucial to be well-prepared. Bring plenty of water (there are no reliable water sources on the trail), high-energy snacks, a repair kit for your bike, appropriate layers of clothing for changing weather conditions, sun protection, and a first-aid kit. A GPS device or the komoot app with the downloaded tour is highly recommended for navigation.

Are there any particularly challenging sections I should be aware of?

Yes, the loop includes several challenging sections. The climb up Mill Creek Road and the steep, rocky Radford Truck Trail are particularly demanding. Riders should also be prepared for occasional washboards and sandy traps, especially along sections like Skyline Drive. Some portions may require pushing your bike.

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