The Left Side of the River section within Rocky Mountain National Park offers climbers an inviting, accessible bouldering experience framed by the striking alpine backdrop of Colorado’s wild basin. Tucked along clear hiking trails and just a short distance from the main parking area, this cluster of boulders delivers a powerful mix of classic problems that captivate both casual visitors and dedicated bouldering enthusiasts alike.

Approaching this area is straightforward yet imbued with the quiet buzz of an alpine forest trail. Starting just before the bridge near the main parking lot, a well-worn hiking path winds through open woods for roughly half a mile. Here, a less-developed but discernible social trail branches off to the left, leading climbers into the heart of this concentrated boulder field. Some problems can also be reached directly by hiking up the horse trail near the hitching post, which offers a practical shortcut to notable climbs like Maneater and Dating Jesus. This convenient access means you spend less time navigating rough terrain and more time focused on the rock.

The climbing here is defined by striking, quality lines. Climbers will find classic challenges including The Open Road (V5), Dating Jesus (V6), Maneater (V7), Bankhead (V7), and Cheesehead (V9). Each problem presents its own unique set of moves—ranging from delicate technical sequences to raw power-driven slopers—all perched on solid granite that rewards precise footwork and confident movement. This stretch of bouldering embodies a dynamic energy: problems balance approachability with challenge, making it a perfect spot to push your limits or simply enjoy the rhythm of climbing in a beautiful natural setting.

Weather plays a crucial role in planning your visit here. Winter through late summer brings seasonal closures due to raptor nesting, particularly from mid-February through July 31st, as designated by Rocky Mountain National Park regulations. These protections mean that certain areas above the Loch Vale-Sky Pond Trail, including cathedral rock formations, are temporarily off-limits. Keep updated on these closures through official park resources to ensure your climb respects local wildlife conservation efforts and aligns with park rules.

Morning climbs catch the boulders mostly in shade, ideal during warmer summer months, while late afternoon can offer the warmth of the sun filtering through surrounding trees. This spot’s elevation and open exposure also mean that weather can shift quickly; pack layers and be ready for sudden changes even on a fair-weather day. Bringing two to three crash pads is recommended given the variety in problem height and landing zones, and a spotter is essential on steeper or more exposed problems to keep your descent safe.

Climbers venturing here will be rewarded not just by the rock but also by the encompassing Rocky Mountain wilderness. The area offers a well-maintained trail system amid lush forest stands, with sweeping alpine views just moments away, blending the rawness of wild Colorado with accessible, quality climbing. Whether you’re chasing V7 sends or simply soaking up the crisp mountain air, the Left Side of the River carves out a special corner of RMNP that combines challenge, beauty, and practicality in every move.

Classic lines like Dating Jesus and Maneater have built reputations as must-try problems, drawing climbers expecting that blend of sharp movement and natural setting. Bankhead and Cheesehead offer routes to test your finger strength and body tension. All are part of a focused bouldering scene where every climb leaves you feeling connected to the granite and the rugged landscape around you.

Before you head out, remember the access information and closures are vital to a responsible climbing trip. Respect seasonal restrictions to preserve the habitat of the returning raptors, and always stick to marked trails to minimize impact. With thoughtful planning, your day at Left Side of the River can be an inspiring experience, blending alpine adventure with approachable climbing, set within one of America’s most iconic mountain parks.