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.

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.

The Columbia is a freshwater wreck dive located in the United States, offering a challenging experience for advanced divers. The wreck lies at depths between 8 and 20 metres, with an average depth of 12 metres. Access is via a shore entry, where divers should be prepared for variable currents and cold water temperatures ranging from 46 to 59 degrees Fahrenheit. Visibility typically fluctuates between 10 and 20 metres. Due to the nature of the wreck, divers must manage risks including entanglement, boat traffic, and shifting currents. A local dive shop is available nearby for parking and current condition updates before entering the water.