At Otter Cliffs, the park maintains fixed anchors on top that must be used instead of trees to belay several climbs. Evaluate them before using also, and notify the park immediately of safety concerns. Climbers at Great Head and Otter Cliffs should know tides and weather forecasts; climbing at these areas is more difficult and dangerous at high tide or with high surf. Climb within your limits. Instruction/Guiding. Climbing instruction and guiding is available locally from private companies in Bar Harbor. Guidebook. Grant Simmons, 2015: Rock Climbs of Acadia. Commonly Used Climbing Areas. Otter Cliff: 60 foot (18 m) sea cliffs, crack and face climbing, rappel access, routes up to 5.12.