Columbia River Canyon is a challenging freshwater drift dive requiring advanced skills and precise buoyancy control. Divers navigate depths reaching 19 metres in a powerful current that necessitates boat-based entry to avoid shore surf. Conditions are demanding, with water temperatures ranging from 40°F to the low 70s°F and visibility that can drop to near zero. Divers should be prepared for cold water, potential entanglement, and heavy boat traffic. The site offers an opportunity to experience a high-energy river environment where various temperate freshwater fish and invertebrates are expected to inhabit the water column. A drysuit and torch are recommended for all dives.

Howard Amon Park is a freshwater river drift dive in the United States. The site features a strong current that carries divers through depths reaching 21 metres, with an average depth of 12 metres. Visibility is variable, ranging from 3 to 10 metres, and can decrease rapidly. Shore entry is standard, though the current requires advanced buoyancy control and careful planning of entry and exit points. Divers must remain vigilant for boat traffic and maintain proximity to the shore throughout the dive. Facilities at the park include parking, toilets, showers, and a rinse station.

Canoe Lake is a freshwater muck dive site in the United States offering shore access. Divers can explore depths ranging from the surface to 13 metres. The site features a muck bottom with dense milfoil beds, which require careful navigation to avoid entanglement. Conditions include a mild current and visibility typically between 10 and 15 metres, though this can shift unexpectedly during a dive. Due to the potential for changing visibility and the presence of milfoil, divers should secure all loose equipment and maintain close contact with their buddy. This site is suitable for beginners looking to practice buoyancy control in a low-pressure environment.