San Dimas Canyon to Sunset Peak Radio Towers

This is a challenging and long hike, rated as difficult. The initial sections from San Dimas Canyon can feature steep single tracks, deep ruts, and sandy washes. As you ascend towards Sunset Peak, the terrain often transitions to fire roads, which can be wide dirt lanes. Expect sustained elevation gain, with some sections described as having a difficult 'final push' of about 1000 feet. It's considered a good training ground for more strenuous hikes.

Parking is typically available near the San Dimas Canyon Park trailhead. It's advisable to check local city resources, such as sandimasca.gov, for specific parking regulations and availability before your visit.

Yes, as this trail is located within the Angeles National Forest, you may need an Adventure Pass for parking at certain trailheads. It's always best to check the official Angeles National Forest website for the most current information on fees, permits, and any specific regulations before you go.

Yes, dogs are generally allowed on a leash on trails within the San Dimas Canyon area and the Angeles National Forest. Always ensure your dog is under control and that you pack out any waste.

The trail offers its greatest rewards in winter when snow might cover the northern mountains, providing stunning views, and in spring when wildflowers are abundant and the landscape is green. Summer can be uncomfortably hot due to a significant lack of shade on much of the route, especially on the fire roads.

The lower sections in San Dimas Canyon feature winding paths through forested areas and potentially slot canyons. As you gain elevation towards Sunset Peak, the views become expansive. From Sunset Peak itself, you'll be rewarded with a stunning 360-degree panorama of the San Gabriel Mountains and the vast urban sprawl to the south. In winter, you might see snow-capped Mount Baldy, and views can extend to Mount Wilson and Strawberry Peak.

Given the trail's length and difficulty, pack plenty of water, especially since there's little shade. Essential items include sturdy hiking boots, sun protection (hat, sunscreen), layers of clothing, snacks, a map or GPS device, and a first-aid kit. Consider trekking poles for the steep sections.

Due to its difficult rating, significant distance (over 40 km), and substantial elevation gain (over 2100 m), this particular route from San Dimas Canyon to Sunset Peak Radio Towers is generally not recommended for beginners or young children. Some shorter, gentler loops within San Dimas Canyon Park might be more suitable for families.

Yes, the route also passes through sections of the Marshall Canyon Trail, Cobal Canyon Loop, and the Marshall-Miller Connector Trail.

Yes, a major consideration for summer hiking is the significant lack of shade along much of the route, particularly on the fire roads. Temperatures can become uncomfortably hot, increasing the risk of heat exhaustion. If hiking in summer, start very early, carry extra water, and be prepared for intense sun exposure.

The primary landmark is the collection of radio and TV antennae located near or just below Sunset Peak. Historically, Sunset Peak was also home to a fire lookout tower from 1927 to the 1970s, highlighting its strategic importance for fire detection in the region.