Mt Zion, Mt Wilson, Mt Harvard, Mt Yale, and Jones Peak Loop

This multi-peak loop is considered extremely difficult and is recommended only for experienced hikers. It involves significant elevation changes, rugged terrain, and sections with no clear path, requiring advanced route-finding and scrambling skills.

The terrain is highly varied. You'll encounter well-maintained trails, but also sections with no clear path, requiring scrambling and bushwhacking. For instance, the ascent up "Bastard Ridge" towards Jones Peak involves using hands to climb, and parts between Mt. Yale and Mt. Harvard are often unmaintained and overgrown. Expect Class 2, borderline Class 3 climbs to reach Mt. Yale.

While there isn't one single official trailhead for this combined loop, common starting points include Chantry Flat or Bailey Canyon. Be aware that parking at popular trailheads like Chantry Flat can fill up quickly, especially on weekends.

Yes, as this loop is located within the Angeles National Forest, you will need an Adventure Pass for parking at most trailheads. These passes can be purchased at ranger stations or local vendors. Always check current regulations before your visit.

Generally, dogs are allowed on trails within the Angeles National Forest, typically on a leash. However, given the extreme difficulty, rugged terrain, and potential for scrambling and bushwhacking on this specific loop, it may not be suitable for all dogs. Consider your dog's fitness and agility carefully.

The best times are typically spring and fall when temperatures are milder. Summer can be extremely hot, especially on exposed sections, and winter can bring snow and ice to higher elevations, making the already challenging route even more hazardous. Always check weather and trail conditions before you go.

Given the length, difficulty, and remote sections, you should pack ample water (more than you think you'll need), high-energy snacks, a map and compass or GPS device (with downloaded offline maps), sun protection, layers of clothing, a first-aid kit, and a headlamp. Wearing long pants and sleeves is highly recommended due to overgrown sections.

This loop offers expansive and rewarding views. From Jones Peak, you can enjoy panoramic 360-degree views of the Los Angeles area, including Catalina Island on clear days, and views towards Mt. Wilson, Mt. Harvard, and Mt. Yale. You'll also see the telescopes of the Mt. Wilson Observatory. Other notable spots include Hoegees Camp, Mt. Wilson Skyline Park Picnic Site, and the Cosmic Cafe near the observatory.

Yes, sections of this extensive loop utilize parts of other established trails. You will find yourself on portions of the Mount Wilson Toll Road and the Mount Wilson Trail as you navigate this challenging route.

Yes, you can find refreshments at The Cosmic Cafe, located near the Mount Wilson Observatory, which is a highlight along this route. This can be a welcome stop during such a long and strenuous hike.

Be prepared for the "Bastard Ridge" section towards Jones Peak, which is described as a brutal mile gaining 1,700 feet and requiring hands-on climbing. The route between Mt. Yale and Mt. Harvard is often unmaintained and overgrown, demanding strong route-finding skills. The ascent to Mt. Yale itself can involve basic climbing.