Hidden deep on Conejo Mountain’s rugged southern slopes, Lost Gulley offers an authentic bouldering experience far from the crowds. Often called "The Machine Gun Nest," this secluded spot features a dramatic cave formed by a leaning boulder resting against a rocky wall, setting a striking stage for climbers seeking natural challenges. The approach demands determination — there’s no marked trail, meaning a bit of bushwhacking through sparse poison oak and rattlesnake country. But the rugged trek is part of the allure, rewarding visitors with a raw, untouched feel that stands apart from more polished crags.

The bouldering here centers around the distinctive Mushroom Dance slab and the imposing Lost Boulder nearby. Mushroom Dance, a V0, is a friendly introduction to the area’s rock texture and style, while Lost Boy, rated V3, steps up the difficulty, offering a punchy challenge for climbers looking to test themselves. Both routes capture the exposed, sun-dappled character of Lost Gulley, where rocky spines and ravine-lined hills frame your climb.

Access to Lost Gulley has its quirks. The original trailhead was closed due to a past accident involving powerlines, so climbers now must park nearby and navigate quietly through a residential trailer park. Respect for local residents is essential — low profiles and adherence to posted signs ensure this fragile access remains open. Once past this brief urban passage, the wild surrounds quickly reclaim your senses.

At about 900 feet elevation, Lost Gulley sits under an open sky that alternates warm sun and cooling breezes, making it ideal in the spring and fall months. The boulders catch ample afternoon sun and cool off as the day wanes, so plan your session accordingly. While the rock type isn’t specified, the area’s texture rewards good footwork and precise movement, making it perfect for those who appreciate technical climbing.

Climbers familiar with the nearby Conejo Boulders know this section as a rugged offshoot, less trafficked but rich with atmosphere and character. The adventuresome spirit here honors its nickname evoking a hidden camp or bunker — now long abandoned but still echoing with stories. Early visitors Alex and Michael helped establish the first climbs, setting the tone for a spot steeped in a gritty, hands-on vibe.

Be prepared for the rough approach: look for the large ravine beside the Prowler Boulder and follow a faint but steady trail climbing upward. Traverse left along rock spines to find the iconic leaning boulder, your destination. A photograph reference is recommended before the hike to ensure you can identify these landmarks, as the area offers no signage or crowds to guide you. Once there, climbing feels like a discovery — each move is earned in the wild.

Lost Gulley isn’t just a place to tick off problems; it’s a slice of climbing adventure that combines thoughtful exploration with quality routes. Whether tackling Mushroom Dance’s inviting slab or testing your mettle on Lost Boy, you’ll find yourself immersed in rock that demands respect and focus. Keep your ears open for rattlers, your steps careful but confident, and enjoy climbing that challenges both body and spirit. This is California climbing raw and real, waiting for those ready to embrace the journey as much as the summit.