20
riders
1
ride
Gravel biking around South San Gabriel offers access to diverse landscapes, primarily defined by the San Gabriel Mountains National Monument. The region features extensive fire roads and mountain trails, providing varied terrain from deep canyons to significant elevation gains. The San Gabriel River also provides greenways and bicycle paths, offering protected routes suitable for cycling. These features combine to create a varied environment for gravel cyclists.
Last updated: July 13, 2026
4
riders
32.8km
03:06
890m
890m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
2
riders
11.9km
01:01
250m
260m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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3
riders
68.1km
05:51
1,970m
1,970m
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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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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This tunnel was blasted into existence in 1942 to form the old Mount Lowe Motorway.
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Ride through Turnbull Canyon and be rewarded with stunning views of Los Angeles County and surround yourself with a mix of natural beauty and historical intrigue. The road climbs with an average gradient of 5.2%, gaining 775 feet in elevation and peaking at 1,161 feet. Be cautious of fast-driving vehicles on the winding roads.
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Explore the looped road around the summit of Mount Wilson, a prominent peak known for its historic Mount Wilson Observatory. The summit houses telescopes, solar towers, and the modern CHARA Array for stellar research. Standing at 5,710 feet, Mount Wilson offers sweeping views of the Los Angeles Basin, the Pacific Ocean, and the Channel Islands on clear days. This site also serves as a major broadcast hub for the Greater Los Angeles area, easy to see with the numerous antennas and relay facilities sticking out all over the summit.
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Built in 1912 this historic bridge plays an important part in the growth of the city. For a short time in the 1930's and 40s it was part of the iconic "Route 66" that stretched from Santa Monica to Chicago. Aside from a short closure and refurbishment after the 1989 Loma Prieta earthquake, the bridge has been in operation for well over a century.
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Brookside Park is Pasadena's largest fully maintained park at 61.1 acres. It sits south of Rose Bowl Stadium with tons of parking off Arroyo Boulevard. The park features a lighted baseball diamond, two softball diamonds, and a large, lighted, multi-purpose field for soccer and flag football. There is also a speaker's platform with permanent seating, numerous picnic tables, barbecue pits, a play area, restrooms, and drinking fountains.
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be cautious, lots of young fast and furious wannabe racers out on the canyon at all hours of the day. listen to your surroundings. be safe
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Gravel biking around South San Gabriel is characterized by rapidly rising mountains and deep canyons, meaning many routes feature significant climbs. Most of the trails listed in this guide are rated as difficult, with substantial elevation gains. For example, the Arroyo Seco Bike Trail β Verdugo Peak loop from South Pasadena involves over 1200 meters of ascent. There is one moderate option, the Turnbull Debris Basin β Turnbull Debris Basin loop from Whittier, which is shorter and has less elevation.
While many routes in the San Gabriel Mountains are challenging, the region does offer some less strenuous options. The Turnbull Debris Basin β Turnbull Debris Basin loop from Whittier is rated as moderate and is shorter, making it a more accessible choice. Additionally, the San Gabriel River Bike Trail, while largely paved, connects to areas suitable for gravel riding and offers access to natural spaces like Bosque del Rio Hondo, which can be more suitable for families.
The South San Gabriel region offers incredibly diverse landscapes. You'll encounter the dramatic San Gabriel Mountains National Monument with its rapidly rising peaks, deep canyons, and extensive fire roads. The area boasts varied ecosystems, including conifer forests, coastal sage, chaparral, and oak woodlands. Rivers like the San Gabriel River and its tributaries create significant ecological areas, and many trails offer panoramic views of the Los Angeles Basin and extensive mountain scenery from higher elevations.
Yes, several excellent loop trails are available for gravel biking. Popular options include the challenging Arroyo Seco Bike Trail β Verdugo Peak loop from South Pasadena, the Turnbull Canyon β Turnbull Debris Basin loop from Rose Hills, and the Brookside Park β View of Eagle Rock loop from South Pasadena. For a longer, more demanding loop, consider the Mount Wilson Summit Viewpoint β Arroyo Seco Bike Trail loop from South Pasadena.
While gravel biking, you can explore various natural and recreational highlights. The Bosque del Rio Hondo is a significant ecological area abundant with wildlife. You might also pass by recreational facilities like the Dragon Playground at Whittier Narrows Recreation Area or enjoy the tranquility of Legg Lake. The Ernest E Debs Regional Park provides access to the Arroyo Seco Trail, offering further exploration opportunities.
The gravel biking routes around South San Gabriel are highly rated by the komoot community, with an average score of 5.0 stars from the few who have reviewed them. More than 30 gravel bikers have used komoot to explore this varied terrain. Riders often praise the challenging nature of the trails, the dramatic mountain scenery, and the extensive network of fire roads that provide a true escape into nature.
Yes, the region boasts spectacular biodiversity. Areas like the Bosque del Rio Hondo, which is part of the San Gabriel River ecosystem, are particularly abundant with wildlife. The diverse ecosystems, including chaparral, oak woodlands, and riparian areas along the rivers, support a variety of native plants and animals. Keep an eye out for local birds and other creatures, especially in the quieter canyon sections.
The South San Gabriel region generally offers good conditions for gravel biking for much of the year. However, given the significant elevation changes and potential for high temperatures in summer, spring and fall are often ideal. Winter can also be pleasant, but it's important to check weather conditions, especially at higher elevations, as some areas in the San Gabriel Mountains can experience colder temperatures and occasional snow. Always be prepared for varied weather, regardless of the season.
This guide features 5 distinct gravel bike trails around South San Gabriel. These routes offer a range of experiences, from challenging mountain loops to moderate canyon rides, all designed to showcase the region's unique gravel biking opportunities.
Yes, the Mount Wilson Summit Viewpoint β Arroyo Seco Bike Trail loop from South Pasadena is a challenging route that provides extensive mountain scenery, including views from higher elevations like Mount Lukens. This trail offers sweeping vistas of the surrounding landscape and the Los Angeles Basin.
The San Gabriel Mountains are part of the Transverse Ranges, which are unique for their east-west orientation and rapid uplift due to tectonic forces, including the San Andreas Fault. This geological activity results in the steep canyons and dramatic elevation changes that define many of the gravel biking routes. These features provide both challenging terrain and visually rewarding rides with impressive geological formations.


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