Split Mountain Gorge

Embark on an extraordinary desert expedition with the Arroyo Tapiado and Fish Creek Wash Trail, a challenging 25.0 miles (40.2 km) hike that immerses you in a landscape of dramatic geological formations. You'll traverse sandy washes and hard-packed dirt, winding through towering canyon walls and exploring extensive mud caves and slot canyons in Arroyo Tapiado. The route continues into Fish Creek Wash, where you'll encounter twisting canyons, unique rock formations like Split Mountain, and ancient fossil reefs, making for a truly unique experience that feels like stepping onto another planet. This difficult route, with 894 feet (272 metres) of elevation gain, typically takes around 10 hours and 36 minutes, ideal for experienced hikers seeking a full day of rugged exploration.

Planning your visit requires careful consideration, as deeper access points often necessitate a high-clearance or 4x4 vehicle. Given the remote desert environment, it's crucial to carry plenty of water and be aware that cell service is unreliable. The cooler months, from October to March, offer the most comfortable conditions for tackling this extensive trail, allowing you to fully appreciate the scenery without the intense summer heat.

What makes this trail particularly notable are the unique geological features, including one of the world's most extensive mud cave systems in Arroyo Tapiado, though the park advises against entering them due to instability. Fish Creek Wash, on the other hand, is a living classroom of earth's history, showcasing millions of years of geological transformation through its diverse formations and fossilized marine life. This trail offers a profound sense of untouched desert wilderness, perfect for those who appreciate raw, natural beauty and a challenging hike.

Hike the easy 4.4-mile Fish Creek Wash Trail in Anza-Borrego Desert State Park, exploring unique geological formations and Split Mountain Go