Top 5 Gorges in San Gabriel Mountains National Monument

Beyond the well-known spots, you can explore the dramatic 'Narrows' section of the East Fork of the San Gabriel River, known for its deep gorge and historical mining sites. Middle Fork Lytle Creek offers magnificent alpine scenery and spectacular waterfalls, while Little Santa Anita Canyon is excellent for practicing canyoneering techniques. Other notable canyons include Cooper Canyon with its scenic falls, Colby Canyon offering peaceful hikes to Josephine Peak, and Arroyo Seco, significant for its natural habitat close to urban areas.

Yes, the canyons are rich in history. The Bridge to Nowhere in the East Fork of the San Gabriel River is a prominent landmark, an abandoned concrete bridge from 1936. You can also find remnants of old mining sites along the East Fork and historic resort ruins in Little Santa Anita Canyon and Arroyo Seco. Shoemaker Canyon is unique for its Cold War-era 'Tunnels to Nowhere,' part of an abandoned nuclear escape route project.

The canyons boast diverse natural beauty. You'll find year-round flowing streams and rivers, such as the East Fork of the San Gabriel River and Middle Fork Lytle Creek, supporting rich aquatic habitats. Spectacular waterfalls can be seen in Middle Fork Lytle Creek and Cooper Canyon Falls. Many areas feature old-growth pines and cedars, providing shaded environments. Keep an eye out for wildlife like Nelson's bighorn sheep and yellow warblers, especially in Middle Fork Lytle Creek.

Yes, the San Gabriel Mountains offer challenging canyoneering routes. Middle Fork Lytle Creek is known for its difficult routes with multiple rappels, some over 100 feet, best suited for experienced canyoneers in summer or early fall. Little Santa Anita Canyon provides a good training ground for beginners, with numerous rappels typically ranging from 15 to 40 feet in a shaded, wooded environment.

The best time to visit depends on your activity. For refreshing natural environments and year-round flowing water, cooler months are pleasant, but be cautious of higher water levels during stream crossings. Summer offers warmer, drier conditions, but remember to carry plenty of water due to heat. For challenging canyoneering in areas like Middle Fork Lytle Creek, summer or early fall is recommended to avoid potential ice. Always check weather conditions, as flash floods can occur during storms.

While some canyon routes are challenging, there are options for families. The hike to Bridge to Nowhere, though 9.5-10 miles round-trip with river crossings, is a popular adventure for active families. The moderate hike to Cooper Canyon Falls is also a pleasant option, passing through an enchanting old-growth forest. Colby Canyon offers a peaceful, shaded walk that can be enjoyed by families seeking less crowded trails.

For hikes into the Sheep Mountain Wilderness, which includes the area around the Bridge to Nowhere and the San Gabriel River East Fork Trail, you will need a free Wilderness Permit. These can be obtained at a ranger station or visitor center in the Angeles National Forest/San Gabriel Mountains National Monument, or at a self-service registry at the trailhead. Additionally, a paid Adventure Pass is required for parking at many trailheads.

Beyond exploring the canyons themselves, the San Gabriel Mountains National Monument offers a variety of outdoor activities. You can find numerous hiking trails, including easy options like those leading to Little Jimmy Campground or sections of the Pacific Crest Trail. For more adventurous cyclists, there are challenging gravel biking routes such as the San Gabriel Canyon loop or the Mount Lukens and Josephine Peak Loop. Running enthusiasts can tackle trails like the Devil's Backbone Trail loop. For more information on these activities, visit the gravel biking, easy hikes, and running trails guides for the region.

Yes, several spots provide stunning views. The San Gabriel Canyon Road Scenic View offers picturesque scenery of the Morris and San Gabriel Reservoirs, with expansive views of the canyon and surrounding landscape. Colby Canyon leads to Josephine Peak, which provides broad views over the Angeles National Forest and the Los Angeles Basin. Additionally, the Devil's Chair offers incredible views of the Devil's Punchbowl and fascinating rock formations.

Many canyon trails, particularly along the East Fork of the San Gabriel River, involve multiple stream crossings. In winter, water levels can be significantly higher than in summer, requiring extra caution. Always be aware of weather conditions; flash floods are a serious danger in these areas, even if it appears dry at your location, if there's rain higher in the mountains. It's crucial to assess water levels and current before attempting crossings.

Yes, several canyons offer welcome shade, especially beneficial during warmer months. Little Santa Anita Canyon is wooded with year-long water flow, providing a cool environment for canyoneering. Cooper Canyon, with its old-growth pines and cedars, offers a tranquil and shaded environment for hiking to Cooper Canyon Falls. Colby Canyon is also described as lush and wooded, providing a pleasant, shaded walk.