Clashymore is a remote snorkelling site located within a natural rocky gut on the southern side of the uninhabited Inishmurray Island. Accessible only by boat, this site is suited for advanced snorkellers due to its exposed location. The environment consists of a rocky topography typical of the Atlantic coastline. Water temperatures at the site fluctuate throughout the year, ranging from 9C in the winter months to 16C in August. As an exposed marine location, conditions can vary significantly, requiring careful planning and experience to navigate the coastal environment safely.

Raghly Pier, located on the Raghly peninsula near Rosses Point, offers a shore entry from a stony beach. The site features a combination of reef, kelp forest, and artificial reef structures around the pier walls. It is suitable for beginners, though divers should be aware of potential surf conditions. Water temperatures in the area range from 9C to 16C throughout the year, making a wetsuit necessary for comfort. Parking is available at the site. The shallow waters around the pier provide a accessible environment for both diving and snorkelling activities.

Bishop's Pool is a natural tidal pool carved into the limestone shelf of Mullaghmore Head. This sheltered, enclosed environment provides a site for diving and snorkelling even when Atlantic swells are active nearby. The site is suitable for beginners, with depths ranging from 1 to 5 metres and an average depth of 3 metres. Entry is via the shore. Conditions vary, with mild currents, potential surf, and hazards including entanglement and jellyfish. Species recorded around this area include harbour seals, common lobsters, sea stars, and various jellyfish species. Water temperatures range from 9C to 16C, with the pool occasionally retaining heat from the sun to become warmer than the surrounding ocean.

Mullaghmore Lobster Farm Steps is a shallow reef and kelp forest site accessed via steps cut into the rock behind the Pier Head Hotel. The site is best explored at high tide when the water covers the inner rocky gullies. Divers and snorkellers can expect depths ranging from 2 to 5 metres, with an average depth of 3 metres. Conditions are generally suitable for beginners, though visitors should be aware of potential surf and currents. Visibility typically ranges between 8 and 15 metres. Facilities available at the site include parking, toilets, showers, and changing rooms.

Thumb Rock is a reef site located 900 metres off the coast of Mullaghmore, Ireland. The reef structure extends to a maximum depth of 25 metres, with the most notable topography found in the shallower sections averaging 15 metres. Divers can expect visibility between 4 and 10 metres. Due to the potential for strong currents and surf, boat access is required. Water temperatures range from 9C to 16C, necessitating the use of a drysuit or thick wetsuit. While the site is suitable for beginners, divers should monitor conditions closely as swells can develop rapidly on this stretch of the Atlantic coast.

Thumb Rock is an offshore limestone reef located 370 metres from the shore at Mullaghmore. The site features vertical walls that descend to depths between 10 and 25 metres. Due to the presence of strong currents and surf, this location is suitable for advanced divers only. Access is by boat, and the site is marked by a buoy. Water temperatures are cold, ranging from 9C to 16C, necessitating the use of thick wetsuits. Visibility at the site typically varies between 4 and 10 metres. The reef structure provides a distinct underwater topography for those exploring the area.

Deadman's Point in Rosses Point is a shore-entry site featuring a reef and cave system. Located where the estuary meets the open bay near the Sligo Yacht Club, the site offers depths ranging from 1 to 5 metres with an average of 3 metres. Divers should be prepared for cold Atlantic water temperatures between 9C and 16C. Conditions vary, with visibility typically between 3 and 10 metres. Hazards include boat traffic, surf, rip currents, and strong currents. The site is suited for intermediate divers, and facilities including parking, toilets, and showers are available. Guided tours are also offered for those exploring this rocky shoreline.

Skuddagh Rock, located off Mullaghmore, Ireland, offers a combination of open reef and cave diving. The site features depths ranging from 20 to 30 metres, with an average of 25 metres, though it can reach 33 metres. Divers experience moderate currents and visibility between 10 and 30 metres. The presence of caves and swim-throughs creates an overhead environment, requiring appropriate training and buoyancy control. Access is by boat only, and a drysuit is recommended due to water temperatures ranging from 9 to 15 degrees Celsius. Species recorded around this area include harbour seals, wrasses, nudibranchs, sea stars, soft corals, and various crustaceans.