The Molenaars is a highly technical whitewater river in South Africa. Its defining characteristic — and primary planning challenge — is that it only runs paddleable conditions for a few days immediately following heavy rainfall in its catchment area. This makes scheduling a trip genuinely difficult, as the window of suitable water levels is narrow and unpredictable.

When conditions do align, the river is considered well worth the effort. Its technical nature means it is best suited to experienced whitewater paddlers comfortable with demanding rapids. Paddlers planning a trip should monitor rainfall in the catchment area closely and be prepared to move quickly once conditions develop, given how briefly the river holds adequate flow.