4.7
(3)
245
riders
12
rides
Mountain biking around Altadena offers access to diverse trails nestled at the foothills of the San Gabriel Mountains. The region is characterized by its mountainous terrain, featuring canyons, ridges, and a variety of natural features. Riders can expect routes that traverse through forested areas and open landscapes, providing a mix of challenging climbs and technical descents. This environment makes Altadena a notable destination for mountain bikers seeking varied experiences.
Last updated: August 17, 2026
42
riders
26.0km
03:33
1,220m
1,220m
Mountain bike the challenging 16.2-mile Mount Lowe and Echo Mountain Loop, featuring historical ruins and panoramic views of Los Angeles.
6
riders
23.6km
02:14
560m
560m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.

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30
riders
29.9km
03:06
1,140m
1,140m
Hard mountain bike ride. Very good fitness required. Suitable for all skill levels.
5.0
(1)
26
riders
13.4km
01:34
630m
640m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
11
riders
55.7km
05:56
2,090m
2,090m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
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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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Henninger Flats sits along the road with views of Altadena. You’ll 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 it’s 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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Andrea Wilson Triangle is a small protected area along Chaney Trail in Altadena. Though not a developed trail, it’s part of a larger effort to preserve open space and wildlife habitat in the foothills near Angeles National Forest.
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Tight, rocky, and exposed—this one’s a classic if you like your rides technical. The climb is tough, but the views are worth it. Watch for hikers, take the switchbacks, and ride early if you want to avoid the crowds. Not for beginners, but a fun challenge if you're up for it.
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The Gabrielino Trail spans 28.8 miles in the heart of Angeles National Forest, featuring a mix of well-known and secluded areas. This scenic route is perfect for running and boasts historical importance as well. In 1970, it became the first National Recreation Trail (NRT) in the country, honored for its regional representation, support of a diverse community, and recognition as one of America's finest trails.
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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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A short climb leads up to the Mt Wilson summit that's covered with telecommunications towers
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Altadena offers nearly 20 mountain bike routes, primarily catering to intermediate and advanced riders. The trails are highly rated by the komoot community, with an average score of 4.9 stars.
While most trails around Altadena are rated difficult, the Lower Gabrielino Trail is often considered one of the more beginner-friendly singletracks in the San Gabriel Mountains. For a moderate option, you can explore routes like the Mount Lowe and Echo Mountain Loop, which offers a challenging but rewarding experience.
Many trails offer stunning views and historical points of interest. The Mount Lowe and Echo Mountain Loop features historical ruins and panoramic views of Los Angeles. You can also find the Mount Lowe Railway Ruins and Inspiration Point on other routes, offering wide basin views and historical artifacts.
Yes, the region features several beautiful waterfalls. While not directly on mountain bike trails, nearby attractions include the seasonal Eaton Canyon Waterfall and Upper Switzer Falls, which can be explored as part of a multi-sport day.
The trails around Altadena are highly rated by the komoot community, with an average score of 4.9 stars from nearly 20 reviews. Over 500 mountain bikers have explored the area, often praising the challenging singletrack experiences, diverse mountainous terrain, and the stunning panoramic views of Los Angeles and the San Gabriel Mountains.
Many trails in the Angeles National Forest, which surrounds Altadena, are dog-friendly. However, leash rules and specific regulations can vary by trail and park area. It's always best to check local signage or the Angeles National Forest website for the most current rules regarding pets on specific trails.
The Altadena area generally offers good mountain biking conditions for much of the year. Spring and fall often provide pleasant temperatures. Summers can be hot, making early morning rides preferable, while winters are typically mild but trails may be affected by rain, leading to temporary closures or muddy conditions. Always check trail conditions before heading out.
Yes, several routes are designed as loops, offering a complete riding experience. Examples include the challenging El Prieto Trail loop from Altadena, known for its singletrack, and the Wella's Peak – El Prieto Trail loop from Altadena, which traverses diverse terrain.
Some areas within the Angeles National Forest may require an Adventure Pass for parking at certain trailheads. It's advisable to check the specific requirements for your chosen trailhead before your ride to ensure you have the necessary permits.
Altadena's mountain bike trails are characterized by their mountainous terrain, featuring a mix of challenging climbs and technical descents. You'll encounter singletrack, fire roads, and diverse landscapes ranging from forested areas to open ridges, all set against the dramatic backdrop of the San Gabriel Mountains.
Altadena and nearby Pasadena offer various cafes and eateries where you can refuel after your ride. While not directly on the trails, you'll find options in the communities at the base of the mountains. The Cub House is a notable highlight in the area that caters to cyclists.
Altadena is well-suited for advanced riders, with many difficult routes. The Ye Alpine Tavern ruins – Inspiration Point loop from Altadena is a demanding ride with significant elevation gain, offering historical exploration and stunning views. The Andrea Wilson Triangle loop from Pasadena Council District 1 also presents a challenging experience.


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