The Sundays River (Sondagsrivier) is a 250-kilometre waterway that originates in the Compassberg Mountains near Nieu-Bethesda and flows in a generally south-easterly direction through the Karoo, passing Graaff-Reinet before winding through the Zuurberg Mountains and the fertile Sundays River Valley past Kirkwood and Addo. It ultimately empties into the Indian Ocean at Algoa Bay, passing through the small village of Colchester in the Eastern Cape.

The primary access point for paddlers is the Cannonville Slipway at the Sundays River Mouth, near Colchester in the Greater Addo area. Canoe rentals are available through Sundays River Adventures, based in Colchester. Paddlers can also contact operators directly to arrange leisure rowing experiences or organised canoe trails by reaching out to the local operator known as Bob, with pricing available on request.

The most commonly described route runs from Colchester toward the river mouth, where the Alexandria Dune Field is accessible on foot after mooring. This stretch places paddlers at the intersection of the river, the Indian Ocean, and the dune system, making it a geographically distinctive outing. The Alexandria Dune Field is the primary natural feature of interest at the terminus of this route.

Sundays River Adventures is listed among the top kayaking and canoeing operators in the Eastern Cape on major travel platforms. Accommodation is available in Colchester, and hosts in the area can assist with connecting visitors to the nearest paddling operator once accommodation is booked.

Specific details on seasonal water temperatures, water quality, hazard assessments, flow rates, and any regulations or restrictions specific to paddling on the Sundays River are best confirmed by contacting local operators directly for current guidance on conditions, safety considerations, and any applicable rules.