Black Mountain, Chamise, and Upper High Meadow Loop

This loop is considered difficult, best suited for experienced hikers or those seeking a rigorous workout. It features significant elevation changes and sustained climbs, including sections like the Quarry Trail with an 800-foot ascent in just over a mile. The total elevation gain for this route is approximately 704 meters (2,310 feet).

You'll encounter a diverse array of terrain, transitioning from shaded oak woodlands and California bay trees to chaparral ridges and open grasslands. While some parts are well-maintained singletrack, other sections can be steep, gravelly, and exposed with little shade.

As you ascend, you'll be treated to expanding views of the San Francisco Bay. From the Black Mountain summit, panoramic vistas stretch across Silicon Valley, the Santa Cruz Mountains, Skyline Ridge, and even the Pacific Ocean on clear days. You'll also pass by the Mary Davey Memorial.

Yes, the route incorporates sections of several official trails within the preserve. You will hike along parts of the Stephen E. Abbors Trail, Upper Rogue Valley Trail, Chamise Trail, Upper High Meadow Trail, and Black Mountain Trail.

No, dogs are generally not allowed on trails within the Rancho San Antonio Open Space Preserve, where this loop is located. Please check the preserve's official regulations for any specific exceptions or updates.

Spring is particularly beautiful, especially along the Chamise Trail, which transforms into a 'tunnel of white flowers,' attracting butterflies and bees. However, due to exposed sections, it's advisable to hike during cooler months or early in the morning during warmer seasons to avoid intense heat. Always bring plenty of water.

Parking is available at the Rancho San Antonio Open Space Preserve. Be aware that parking lots can fill up quickly, especially on weekends, so arriving early is highly recommended to secure a spot.

No, there are typically no permits or entrance fees required to access the trails within the Rancho San Antonio Open Space Preserve. However, it's always a good idea to check the official Midpeninsula Regional Open Space District website for the most current regulations before your visit.

The diverse ecosystems along the route provide habitats for various wildlife. You might spot rabbits and deer, particularly along sections like the Rogue Valley Trail. Birdwatching is also popular in the preserve.

The estimated duration for this hike is approximately 5 hours and 8 minutes. However, given its difficult rating and significant elevation gain, experienced hikers should plan for 6 to 7 hours, especially if taking breaks to enjoy the views.

Given the length and difficulty, you should bring plenty of water, especially during warmer months, as some sections are exposed. Sturdy hiking boots, sun protection (hat, sunscreen), snacks, and a map or GPS device are also highly recommended.