5.0
(1)
60
riders
8
rides
Gravel biking around Sierra Madre offers a diverse landscape characterized by rugged mountains, deep canyons, and varied ecosystems. The region encompasses areas within the San Gabriel Mountains and Angeles National Forest, providing a mix of pine forests and more arid, desertic landscapes. Riders can expect challenging climbs and scenic trails with panoramic views of the San Gabriel Valley. The terrain often features a combination of dirt roads, fire roads, and occasional paved sections.
Last updated: May 18, 2026
5.0
(1)
17
riders
46.7km
04:38
1,710m
1,710m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
11
riders
24.4km
02:34
1,070m
1,070m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5
riders
52.8km
04:47
1,430m
1,430m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
riders
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
1
riders
66.0km
05:38
1,680m
1,680m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Short tunnel on the eastern slope below San Gabriel Peak, part of the old Mt Lowe Motorway, that was never paved. The tunnel is very short, so you don't have to worry about bringing light. The road continues to the trailhead half a mile uphill.
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Just below the MtโฏWilson Trailhead on Red Box Road, this overlook and memorial is a perfect place to pause. Sit and take in sweeping views of the San Gabriel Valley, and read the memorial plaque honoring early conservation efforts.
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Henninger Flats sits along the road with views of Altadena. Youโll pass by it while climbing the Mt. Wilson Toll Road and can take a moment to catch your breath while enjoying the views. The route features a steady climb with minimal shade, so itโs best to start early, especially in summer. At the top, enjoy panoramic views of the San Gabriel Valley and explore the area, which includes a visitor center, picnic spots, and a tree nursery.
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For a ride with history and views, check out the Ye Alpine Tavern ruins in the San Gabriel Mountains. Once a popular mountain resort, it burned down in 1936 and was later demolished, but you can still spot the stone fireplace, foundation, and water tank.
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There are lots of vintage shops and cafes in the historic downtown. Library Park is a great place to rest in the shade with a bite to eat before continuing your ride.
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This tunnel was blasted into existence in 1942 to form the old Mount Lowe Motorway.
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Old Town Monrovia is a 10โblock historic district centered on Myrtle Avenue, that has brickโlined sidewalks, vintage lampposts, and boutique shops.
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The Sierra Madre region offers a diverse gravel biking landscape, characterized by rugged mountains, deep canyons, and varied ecosystems. You'll encounter a mix of dirt roads, fire roads, and occasional paved sections, particularly within the San Gabriel Mountains and Angeles National Forest. Expect challenging climbs and scenic trails with panoramic views.
While many routes in the Sierra Madre are rated as difficult due to significant elevation gain, there is at least one moderate option available. The Devil's Gate Dam โ View of Downtown Los Angeles in Distance loop from Altadena is a good choice for those looking for a less strenuous ride, offering views of Downtown Los Angeles.
Many gravel routes in Sierra Madre pass by interesting historical sites and natural features. For instance, the Mueller Tunnel โ Mueller Tunnel loop from Altadena incorporates a historic tunnel from the old Mount Lowe Motorway. You can also explore the Mount Lowe Railway Ruins, or visit the scenic Eaton Canyon Waterfall. The Ye Alpine Tavern ruins โ Inspiration Point loop takes you past the historical ruins of a former mountain resort.
Absolutely! The Sierra Madre region is known for its stunning vistas. The Ye Alpine Tavern ruins โ Inspiration Point loop from John Muir High School offers panoramic views of the San Gabriel Valley. Additionally, the Pasadena Historic City Hall โ View from Mount Lukens loop from Memorial Park provides impressive views from Mount Lukens.
Yes, many of the gravel bike trails in Sierra Madre are designed as loops, allowing you to start and end at the same point. Examples include the Duarte Bike Trail โ Monrovia Historic Downtown loop, the Mueller Tunnel โ Mueller Tunnel loop, and the Devil's Gate Dam โ View of Downtown Los Angeles in Distance loop.
The Sierra Madre region, including the San Gabriel Mountains, generally offers good conditions for gravel biking for much of the year. However, given the challenging climbs and high elevations, spring and fall often provide the most comfortable temperatures. Summer can be hot, especially in more arid sections, while winter might bring cooler temperatures and occasional precipitation at higher altitudes.
Yes, some routes combine natural beauty with access to local towns. The popular Duarte Bike Trail โ Monrovia Historic Downtown loop from Monrovia guides riders through the charming Monrovia Historic Downtown, where you can find various amenities. Additionally, the The Cub House is a known facility in the area.
Gravel biking in Sierra Madre is generally considered challenging. Most routes feature significant elevation gain and are rated as difficult, making them suitable for experienced riders. However, there is at least one moderate option available for those seeking a less intense experience.
There are several dedicated gravel bike trails in the Sierra Madre region, with at least five distinct routes detailed for exploration. These routes offer a variety of distances and challenges across the diverse landscape.
The gravel biking routes in Sierra Madre are highly regarded by the komoot community, holding an average score of 5.0 stars. Over 30 gravel bikers have used komoot to explore the varied terrain, often praising the challenging climbs, scenic vistas, and the unique combination of natural beauty and historical sites.
Yes, some routes provide a unique perspective of the surrounding urban landscape. The Devil's Gate Dam โ View of Downtown Los Angeles in Distance loop from Altadena offers clear views of Downtown Los Angeles in the distance, contrasting the rugged mountain environment with the city skyline.
The Sierra Madre region is rich in natural features. Riders can expect rugged beauty, challenging climbs, and scenic trails. The area includes various canyons, such as those found in Bailey Canyon Park, and diverse environments within the Angeles National Forest and San Gabriel Mountains National Monument, ranging from pine forests to more arid landscapes.


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