The Southwest is an inland freshwater diving region built around desert reservoirs, sinkholes, and river sites rather than any coastline. Lake Mead, Lake Pleasant, and the Santa Rosa Sinkholes anchor the area, each offering a distinct character: Lake Mead draws divers to deliberately sunk wrecks and volcanic canyon walls, Lake Pleasant delivers a variety of artificial reefs and wall dives, and the Santa Rosa Sinkholes provide bell-shaped sinkhole dives and shallow wreck encounters. The region suits a wide range of abilities, with many shore-access beginner sites alongside more technical intermediate dives. Carp, Channel Catfish, and Livebearer are consistently observed across sites, while Trout and Large Mouth Bass appear at select locations.
7 areas
21Freshwater wreck diving and volcanic canyon walls, with sunken vessels and bass-filled depths accessible from both shore and boat.
20A freshwater reservoir with artificial reefs, walls, and wrecks. Ideal for beginners, with Carp and Catfish among the most commonly sighted species.
18Freshwater sinkholes in the New Mexico desert, offering shore-entry cave, wreck and reef diving alongside accessible snorkelling.
67 operators
Freshwater canyon diving with submerged desert landscapes and a diverse range of lake fish, including Catfish, Bass, and Rainbow Trout.
Fin maps 87 sites in Southwest (59 scuba diving sites and 42 snorkelling spots, with some suited to both), organised into 7 areas.
The Southwest is entirely freshwater, so the wildlife is fish rather than reef species. Carp and Livebearer are observed very commonly across sites, and Channel Catfish appear at a wide range of locations. Trout, Blue Gill, Large Mouth Bass, and American Crayfish have also been recorded, with Rainbow Trout and Brown Trout appearing at select sites.
A large proportion of sites in the Southwest are rated for beginners, including shore-entry locations such as Bottomless Lakes Park, Desert Tortoise Road, and Boulder Beach. Many of these feature calm conditions and no significant current, making them practical for those completing training dives or building confidence. Intermediate divers will find more challenge at sites like Sparks Marina and Black Canyon.
Lake Mead is best known for wreck diving, particularly Wreck Alley where multiple vessels have been deliberately sunk, and Black Canyon with its carved volcanic walls. Lake Pleasant concentrates on artificial reefs and wall sites, with a good spread of beginner-friendly access points. The Santa Rosa Sinkholes offer a different feel entirely, with bell-shaped sinkhole formations and shallow wrecks including a twin-engine aircraft at Perch Lake. Lake Powell and Pyramid Lake provide quieter alternatives with fewer but distinct sites.
Shore entry is the dominant access method across the Southwest, covering the majority of listed sites and making independent diving straightforward without chartering a vessel. A handful of sites, including Black Canyon, are boat-access only, and several others offer the choice of shore or boat entry. Operators such as Desert Divers, Sin City Scuba, and Las Vegas Scuba Academy are based in the region and can provide guided boat access where needed.
