The Assegaai River in South Africa is a whitewater river that flows below Heyshope Dam, passing through SAPPI timber plantations for a significant portion of its length. The weir immediately below Heyshope Dam creates a standing wave that is likely to interest playboaters. Downstream, the character of the river shifts toward increasingly frequent and intense rapids, with the gradient and difficulty building as the river progresses. Paddlers who have scouted the river have found themselves in a near-continuous cycle of putting in, paddling a short distance, scouting, and portaging, suggesting the river carries serious whitewater at higher water levels.

Access is a critical planning consideration. Because much of the river runs through SAPPI plantation land, paddlers must make prior access arrangements with SAPPI before attempting a trip. Arriving unannounced is strongly discouraged, and maintaining a respectful relationship with the landowner is important for preserving future access for the paddling community.

Safety demands careful attention on this river. Retentive hydraulics are present, and the consequences of swimming in a retentive hole without a support party are severe. Solo paddling is particularly risky given the remote nature of the run and the frequency of difficult features. The river was scouted during flood conditions, which amplified both the hazards and the appeal of the features, so water level will significantly affect the experience.

Overall, the Assegaai presents as a committing whitewater run suited to experienced creek boaters who have arranged proper access, are paddling with a competent group, and are prepared for extensive portaging on a first descent or unfamiliar run.