Port Walthall Channel is a tidal channel of the Appomattox River in Chesterfield County, Virginia, providing a direct connection to the wider James River. The paddling environment is generally calm and somewhat protected, though open stretches can be exposed to wind, particularly from the north, south, or northeast, which can create fetch and chop. The channel experiences a gentle to moderate tidal current, which is a primary factor for trip planning. For an upstream paddle within the channel, expect a gentle current. For a downstream trip to the James River confluence, a moderate tidal current is present; it is recommended to paddle with the outgoing tide for an easier journey to the James and return with the incoming tide. Motorboat traffic is typically low to moderate within the channel but increases significantly near the James River, which sees larger commercial vessels, including ultra-large container ships from the Port of Virginia. Paddlers must be vigilant for wakes, especially when approaching the confluence.

Several public access points serve the channel. Riverview Landing II and III offer direct access, with Riverview Landing III described as having a likely natural, less-developed setting with limited roadside or unpaved parking, requiring self-sufficiency. The nearby Hopewell City Marina, associated with Riverview Landing II, provides an excellent accessible kayak launch featuring a floating platform with rollers and handrails, along with amenities like restrooms, a fishing pier, and both free and paid parking options. Other listed launch sites include multiple "Port Walthall Channel Boat Ramps" in Chester. The channel is suitable for scenic exploration, birdwatching, and discovering hidden coves and inlets. A common route involves paddling from the channel to the James River confluence for broader views, while another explores the upper reaches of the channel itself.