4.0
(3)
60
riders
3
rides
Gravel biking in San Gabriel Mountains National Monument offers extensive trail networks across diverse landscapes. The region is characterized by towering peaks, deep canyons, and varied ecosystems including chaparral and oak woodlands. Riders can expect significant elevation gains and varied terrain, with many routes following fire roads and mountain trails. The Monument's rivers are crucial for the Los Angeles region and support diverse wildlife.
Last updated: April 25, 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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4
riders
23.8km
02:55
960m
960m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4
riders
36.4km
02:31
590m
590m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
2
riders
Easy gravel ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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Popular around San Gabriel Mountains National Monument
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 Mtβ―Wilson 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. Youβll 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 itβs 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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Cherry Canyon Park is an area of 130 acres in the San Rafael Hills, close to La CaΓ±ada Flintridge. It features multiple trails and fire roads for horses, mountain bikers and hikers, but also various single tracks that are only for hiking. From the trails, you will get a great overview over the area.
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This tunnel was blasted into existence in 1942 to form the old Mount Lowe Motorway.
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Climb out of the Brookside Golf Club area and into the Pasadena suburban area. This climb has a nice shoulder and is lined with trees.
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There are several dedicated no-traffic gravel bike trails in the San Gabriel Mountains National Monument. This guide features 4 routes, ranging from easy to difficult, ensuring options for various skill levels.
Yes, for an easier, family-friendly option, consider the San Gabriel River Greenway β Santa Fe Flood Control Basin loop from Duarte/City of Hope. This route offers a relatively flat experience, ideal for those seeking a less strenuous ride away from vehicle traffic. The West Fork National Scenic Bikeway, mentioned in region research, also provides a unique, relatively flat, and paved option along the West Fork San Gabriel River, accessible to families.
The San Gabriel Mountains National Monument offers diverse terrain. You can expect everything from extensive fire roads and challenging mountain trails with significant elevation gains to more gentle, paved sections like the West Fork National Scenic Bikeway. Many routes feature varied ecosystems, including chaparral and oak woodlands, with some traversing high alpine environments or deep canyons.
Many trails offer stunning views and access to unique natural features. You might encounter towering peaks, deep canyons, and diverse ecosystems. Specific highlights include the Bridge to Nowhere, scenic viewpoints like San Gabriel Canyon Road Scenic View, and the Colby Canyon Trail which provides stunning views of the Angeles Forest. During the rainy season, you might also enjoy beautiful waterfalls along the West Fork San Gabriel River.
The San Gabriel Mountains National Monument offers year-round recreational opportunities. However, for gravel biking, spring and fall generally provide the most pleasant temperatures. Summers can be hot, especially at lower elevations, while winter can bring snow to higher peaks, making some trails inaccessible or requiring specialized gear. Always check local weather conditions before heading out.
Absolutely. Experienced riders looking for a challenge can explore routes like the Mueller Tunnel β Mueller Tunnel loop from Allen, which covers over 46 km with significant elevation gain. Another demanding option is the Ye Alpine Tavern ruins β Inspiration Point loop from John Muir High School, offering over 1000 meters of climbing.
The San Gabriel Mountains National Monument is highly rated by the komoot community, with an average score of 4.0 stars. Reviewers often praise the extensive network of fire roads, the challenging climbs, and the panoramic views that make for a rewarding gravel biking experience away from vehicle traffic.
Yes, many of the gravel bike trails in the San Gabriel Mountains National Monument are designed as loops, allowing you to start and end at the same point without retracing your path. Examples include the View from Mount Lukens loop from Upper Arroyo Seco and the San Gabriel River Greenway β Santa Fe Flood Control Basin loop from Duarte/City of Hope.
While specific parking details vary by trailhead, many access points to the San Gabriel Mountains National Monument's extensive trail network are designed to accommodate visitors. It's advisable to research the specific starting point of your chosen route for detailed parking information. Some areas may require an Adventure Pass for parking.
Yes, the region has a rich history. Along certain routes, you can find historical artifacts from the turn-of-the-century Mount Lowe Railway, offering a glimpse into the area's past. The Ye Alpine Tavern ruins β Inspiration Point loop from John Muir High School specifically mentions ruins, suggesting historical elements.
Many of the higher elevation trails and viewpoints within the San Gabriel Mountains National Monument offer panoramic views. The Colby Canyon Trail, for instance, provides stunning views of the Angeles Forest and Los Angeles, which can be accessed or seen from various gravel routes in the area.


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