The Gamka River is a multi-day paddling destination in the Western Cape, flowing through the Swartberg mountains and the area known as Die Hell. It is rated Grade 2–4, offering a mix of flat sections and rapids that suits paddlers with intermediate to advanced whitewater experience.

The most common put-in is at Gamkapoort Dam, located approximately 40 kilometres from Prince Albert. The dam was constructed in the 1960s to manage the flow of the Gamka River and releases no water, making access to this starting point somewhat remote — visitors must arrange access in advance as no public roads lead directly to the dam. From the dam, a popular two-day section runs to Calitzdorp. Beyond Calitzdorp, the Gamka joins the Olifants River to form the Gouritz, and the stretch from Calitzdorp down toward the Herbertsdale area constitutes another roughly two-day run. Paddlers can choose their take-out depending on the length of trip desired.

The river corridor passes through rugged Karoo and mountain scenery, with wildlife present throughout. Fish eagles are audible along the route. The character of the river alternates between longer flat sections and rapids, so paddlers should be prepared for both moving water and periods of flatwater travel between the more technical stretches.

Access to Gamkapoort Dam and the Nature Reserve requires advance arrangement due to the area's isolation and limited road access. This should be factored into trip planning well ahead of departure.