Topaz Lodge Waterfront on Lake Tahoe offers shore access to a freshwater environment with a bottom composition of silt and gravel. Snorkellers can explore the area near the pier structures, which reach depths of 1 to 10 metres, averaging 4 metres. Conditions are variable, with visibility ranging from 9 to 16 metres and mild currents. Water temperatures fluctuate significantly by season, from near freezing in winter to 18-26°C in shallow summer areas. Divers and snorkellers should be aware of cold water, thermoclines, potential entanglement, and boat traffic. Facilities including parking, a cafe, toilets, and showers are available on-site.

Topaz Lake Recreation Area on the northeast shore offers a freshwater dive experience in a high-desert reservoir. Divers can explore rocky shorelines and artificial structures at depths ranging from 1 to 15 metres, with an average depth of 5 metres. The site is suitable for beginners, though conditions vary significantly with the seasons. Water temperatures fluctuate from near freezing in winter to 26°C in shallow summer areas. Visibility typically ranges between 5 and 15 metres. Entry is via the shore, and divers should remain aware of boat traffic and the risks associated with cold-water exposure. The habitat supports various temperate freshwater fish and invertebrates.