Black Hills

Image credit: Wikimedia Commons

Overview

Black Hills is widely recognized as one of the most vibrant and biologically dense dive sites surrounding the Honduran island of Utila. Located off the island’s southeastern coast, Black Hills is a true seamount—an underwater mountain that rises abruptly from the deep ocean floor to a flat peak resting approximately 10 to 12 meters (33 to 40 feet) below the surface.

Because it sits isolated in open water, the seamount acts as an obstruction to passing oceanic currents. These currents create upwellings of nutrient-rich water, which in turn support a massive concentration of marine life that is significantly denser than what is typically found on Utila’s coastal fringing reefs. The site features a steep, sloping profile dropping well beyond recreational limits, meaning a maximum planned depth of 30 to 35 meters is standard. Due to the open ocean exposure, potential for strong currents, and deep profile, Black Hills is recommended for divers with an Advanced Open Water certification. While an open water course student could technically dive the shallow peak under ideal conditions, they would miss the primary attractions located deeper on the mount. For divers researching the best places to learn how to execute negative entries and manage blue-water ascents, Black Hills is an excellent training ground.

The Dive Experience

Black Hills is accessed via dive boats departing from Utila’s main harbor. The transit time is generally 30 to 40 minutes, depending on the vessel and the sea state. Because the site is exposed, surface conditions can occasionally be choppy.

The standard dive profile involves a free descent directly down to the deepest planned point on the seamount. From there, divers slowly spiral their way up the circumference of the mountain, utilizing the gentle incline to manage their multi-level profile. The currents here range from mild to moderate, and divers often need to kick steadily to maintain their position or slowly drift along one side of the mount. Visibility is typically excellent, often reaching 30 meters. As with most Caribbean destinations, standard travel and packing guidelines apply: a 3mm wetsuit or rash guard is generally sufficient in the warm 26°C to 29°C (79°F to 84°F) water.

What You’ll See

The sheer volume of fish is the primary attraction at Black Hills. The seamount is constantly engulfed in massive, swirling schools of Creole wrasse, yellowtail snapper, and horse-eye jacks that part to allow divers to swim through.

Large pelagics patrol the outer edges of the reef structure. Solitary great barracudas and schools of Atlantic spadefish are common sights in the blue water away from the reef wall. The reef structure itself is heavily encrusted with massive barrel sponges and deep-water gorgonians, which provide hiding spots for macro life such as arrow crabs and various blennies.

Most notably, because Black Hills sits in the open ocean off Utila’s coast, it is a prime location for encountering passing whale sharks (Rhincodon typus), particularly during the migration seasons of March through May and August through October. While they are usually spotted near the surface feeding on plankton blooms, they occasionally cruise past the seamount in deeper water.

Planning Your Dive

Because of its popularity and relatively small geographic footprint, Black Hills can feel crowded if multiple dive boats arrive simultaneously. Divers must pay close attention to their buoyancy to avoid damaging the sponges on the steep slope, and must closely monitor their dive computers to avoid exceeding no-decompression limits during the deeper sections of the spiral ascent.