A short walk from the bustling hubs of Joshua Tree’s Forgotten Valley, the Manx/Asteroid Belt Circuit unfolds as an inviting playground for boulderers seeking variety and quality climbs amid the park’s iconic desert scenery. Approached most commonly from Hidden Valley Campground or the nearby day parking beneath Intersection Rock's east face, this circuit wraps around the back of the imposing Cyclops Rock before extending eastward to the sandy washes that cradle the Asteroid Belt boulders. The terrain is approachable yet wild, with sandy trails weaving through a landscape dotted with boulders that call to climbers of all skill levels.

Here, the climbs span a broad range. While the majority of problems remain accessible with grades at V5 and below, there’s no shortage of challenge for those looking to test their strength and technique with several V8 and even a V11 for the boldest adventurers. Each climb presents a unique encounter with the rock—from the subtle nuances of balance and footwork demanded by Off Camber (V4) and Peabrain (V4) to the more dynamic moves scattered throughout Optigrip (V3) and Undertow (V3). Whether you’re tuning up your skills on The Boxer Problem (V2) or chasing the satisfying complexity of Pigpen (V4), the diversity here keeps the day lively and rewarding.

While the technical grades help frame your day, the real allure is the balance between the climbs and the environment. The desert air carries the scent of dry brush and granite, and the cavernous shade beneath larger boulders offers welcome relief on blazing afternoons. Elevation sits around 4,202 feet, giving each ascent a crispness in the air that energizes and refreshes, especially in the earlier or later months of the climbing season.

Getting to the Manx/Asteroid Belt Circuit is straightforward but benefits from some local guidance. Parking is convenient either in the large day use lot near Intersection Rock or along the road opposite Cyclops Rock’s entrance by Hidden Valley Campground. From here, expect a 5 to 10-minute walk to reach the Manx Boulders, with an additional 10 to 15 minutes if you push onward to the Asteroid Belt. The trails are well-worn and peaceful, framed by sparse vegetation and wide-open desert views.

Visitors should remain aware of Joshua Tree National Park’s climbing regulations. Vegetation cannot be used for anchors, and all bolt hangers must blend with the rock in neutral or rock colors to maintain the park’s natural aesthetic. These rules ensure the area remains pristine for future climbers and wildlife alike. Seasonal raptor closures may also be in effect, so checking the park’s official compendium before your trip is essential.

Classic climbs here represent a snapshot of Joshua Tree’s signature bouldering style—technical sequences, solid crimps, and the occasional powerful mantle. Among favorites are The Boxer Problem (V2), Out of Touch (V2), Undertow (V3), and Pigpen (V4), a true gem with a 4-star rating that beckons with its bold moves and flawless rock. For those who like a touch more challenge, Yogi Variation (V8) offers hard-fought moves that demand precision and commitment.

Protection on these problems is typical of high-quality Joshua Tree granite—mostly bouldering pads suffice, but a good number of pads are recommended due to varied landing zones and the desert’s often uneven surface. The rock is generally sound, but climbers should scout landing spots and stay alert for loose debris. Pads will also help soften landings on some of the trickier V4 and above circuits.

The circuit faces predominantly east and northeast, offering a blend of morning shade with afternoon sun — ideal timing shifts depending on the season. Spring and fall provide the best windows, with cooler temperatures and milder desert weather that make extended sessions more comfortable.

Descending is simple: most problems top out on boulders that allow easy downclimbing or dropping to sand below without risk. Just be mindful of sharp granite edges and keep your approach and exit routes clear to maintain a smooth flow during your outing.

Ultimately, the Manx/Asteroid Belt Circuit serves as a vibrant, accessible experience in one of California’s premier climbing destinations. It captures the rhythm of Joshua Tree perfectly — adventures that mix invigorating climbing with moments to reconnect with stark desert beauty and a community of climbers driven by exploration and respect for the land.