Mount Wilson Toll Road

Parking is typically available in the residential areas near the trailhead, such as at the end of Pinecrest Drive in Altadena. It's crucial to be mindful of all posted parking signs and respect local residents. Arriving early, especially on weekends, is recommended to secure a spot.

Yes, dogs are generally allowed on the Mount Wilson Toll Road trail. As this trail is located within the Angeles National Forest, please ensure your dog is kept on a leash at all times and that you clean up after them to maintain trail etiquette and protect wildlife.

The trail is generally accessible year-round. Spring and fall offer pleasant temperatures, making them ideal. Summer can be very hot, especially on the exposed lower sections, so an early start is essential. While the summit may experience some snow in winter, the trail remains open, offering a different experience. Always check weather conditions before heading out.

The Mount Wilson Toll Road is located within the Angeles National Forest. While there is no specific permit required for hiking the trail itself, a National Forest Adventure Pass may be required for parking at certain trailheads within the forest. Check the official Angeles National Forest website for the most current information on parking pass requirements.

The trail is primarily a wide dirt fire road, making it suitable for hikers, mountain bikers, and horses. The initial 2.5 miles up to Henninger Flats are often wide open and mostly shadeless. Beyond Henninger Flats, the terrain can become rockier in sections, with some gravelly parts. You'll cross a bridge over Eaton Canyon early in the ascent.

This historic route offers several points of interest. About 2.5 to 3 miles up, you'll reach Henninger Flats, a great rest stop with shade, picnic tables, water, a museum, and a tree nursery. Further up, the trail leads to the historic Mount Wilson Observatory and the Cosmic Cafe, which provides food, snacks, and potable water. Don't miss the Mount Wilson Trailhead overlook and memorial for expansive views.

Water sources can be unreliable along the majority of the trail. Potable water is reliably available at The Cosmic Cafe at the Mount Wilson Observatory summit and also at Henninger Flats. Due to the trail's length and sustained climb, it's highly recommended to carry plenty of water, especially during warmer months.

On clear days, the views are expansive and fantastic. You'll be treated to panoramic vistas of the Los Angeles Basin, the Palos Verdes Peninsula, and even Catalina Island. As you ascend, you'll also see other peaks in the San Gabriel Mountains, such as San Gabriel Peak, Mount Markham, and Mount Lowe.

The Mount Wilson Toll Road is primarily an out-and-back trail. It's approximately 9.2 miles one way to the summit, making it an 18 to 20-mile round trip depending on your starting point. While some extended loops involving other trails are possible, the toll road itself is a linear route.

Yes, while the primary route is the Mount Wilson Toll Road, sections of the trail also intersect or run concurrently with other paths. You'll find it crosses parts of the Mount Wilson Trail, Firebreak, and Rim Trail.

Given its length, significant elevation gain, and sun exposure, you should bring plenty of water (more than you think you'll need), sun protection (hat, sunscreen), sturdy hiking shoes, snacks, and layers of clothing. Trekking poles can also be helpful for the sustained climb and descent. Don't forget a map or GPS device.