Prepare for an authentic bouldering adventure on the E Lake Trail, where the Dark Fishing Spider boulder stands out as one of Backbone State Park’s most compelling attractions. Towering with an intimidating presence, this large boulder invites climbers to embrace both its scale and the elegant lines etched into its face. The approach is rewarding in itself. After about eight minutes of meandering along the well-trodden E Lake Trail, the canopy opens enough to reveal a dramatic vertical wall—your destination is unmistakable. A misstep could have you strolling all the way to the bridge, but keep your eyes left and you'll encounter the unmistakable block with its clean, proud face jutting from the forest floor.

The climbs at Dark Fishing Spider are highball, demanding not only strong movement but also cool conviction on exposed topouts. For those ready to step up to the challenge, this spot delivers a focused selection of quality problems, each earning local admiration for their aesthetics and movement. Classic problems like Ambush Predator (V2) and Queen Arachnid (V2) beckon with four-and-a-half star quality. Their lines are visually striking and featured enough to be approachable yet high enough to ensure your full attention all the way through the final moves. Dark Fishing Spider (V3) provides a slightly tougher puzzle, and Sexual Cannibalism (V3) ramps up both the commitment and sense of accomplishment, with each line earning enthusiastic reviews from regular visitors.

Despite the intimidating appearance, the holds are generally positive, and the landings—while good for a highball—demand attentive padding and a solid team of spotters. This is not a place for solo circuits. The problems climb beautifully, encouraging you to move with precision and handle exposure with grace rather than brute force. The high quality of each line here is not an accident—the concentrated nature of the boulder means every problem counts, and aesthetics blend seamlessly with movement.

Located at a modest 1,051 feet elevation, the area enjoys a moderate climate for climbing in much of the year. The trail is clear but can become muddy after rainfall, so check the weather before venturing out. Most visitors find the prime season spans spring and fall, when skies are clear and the trail is dry but the undergrowth is not too thick. On a good day, soft light streams through the trees, illuminating the face and keeping holds just grippy enough for confident sends.

Access is simple but not to be rushed: set your GPS to the Backbone State Park entrance and follow signs to the East Lake Trailhead. Give yourself time to take in the surroundings as you walk, because the sense of seclusion only builds as you approach the boulder. Climbing here is as much about the experience as it is the send—the forested approach, the anticipation as the boulder comes into view, and the exhilaration of topping out on such a sizable feature stay with you long after you leave.

When planning your day, bring multiple pads and a committed group of spotters, especially given the highball nature of the lines. The boulder’s landing zones are good for the area but far from forgiving. Pack for variable weather conditions, and respect the park's regulations to help keep this venue open and clean for everyone.

Backbone State Park is a haven for those who value natural beauty and the raw appeal of bouldering. With Dark Fishing Spider, the focus is clear: test your mettle on quality highballs, enjoy moments of pure movement against a backdrop of Iowa forest, and walk away with both a challenge met and a new favorite spot etched in memory. Whether you’re chasing your first V2 highball or looking to push on to V3 and beyond, this boulder gives you plenty of reason to linger and return. Just don't get too distracted by the scenery when your beta needs your full attention.