The Caher River in County Clare, Munster, is a short but demanding whitewater run of approximately 2 kilometres, graded at Class 3 to 4. Its compact length belies its reputation among Irish paddlers, with the river widely regarded as one of the country's standout whitewater experiences.

The character of the run is best described as technical and committing, with the river's difficulty increasing markedly at high water levels. Footage of the river in flood conditions illustrates a fast, powerful flow that demands solid whitewater skills and sound judgment. Paddlers considering the Caher should be comfortable at the upper end of the Grade 3-4 spectrum before attempting it, particularly when water levels are elevated.

Given the river's short length and the nature of Irish Atlantic weather patterns, water levels on the Caher can rise and fall quickly, making timing an important factor in trip planning. The river is best approached after periods of significant rainfall when flows are sufficient to make the run worthwhile, though very high water transforms the character of the run considerably and warrants additional caution.