The River Eden in Cumbria is one of the longest rivers in the region and offers a wide range of paddling experiences, with grades spanning from 2 to 5 depending on the section chosen. The uppermost section from Hellgill reaches Grade 4 in normal conditions and Grade 5 in high water, while the majority of the river runs at Grade 2-3, making it accessible to a broad range of paddlers. It is a popular, fast-flowing river well regarded within the river running and white water community.

The most frequently paddled section runs from Lazonby to Armathwaite, covering approximately 8 kilometres. Access is from the car park above Lazonby Bridge (NY550402), with egress on the right bank below Armathwaite Bridge (NY394764). This stretch passes through a wooded sandstone gorge, is relatively flat with a couple of entertaining rapids, and is commonly run in open boats by novice groups. A shorter upstream section from Langwathby to Lazonby is also paddled and requires less water to run, making it a useful alternative when levels are low.

The Great Corby gauge is the standard reference for this section of river. A reading of 1.0 is recommended for a reasonable trip on the Lazonby to Armathwaite run, while the Langwathby to Lazonby section has been paddled at 0.75 on the same gauge. The river is runnable at most levels, but conditions should be checked before setting out as the Eden, like most Cumbrian rivers, rises and falls rapidly.

The primary hazard on the popular lower section is Armathwaite Weir. It can be run on the left or on the right, though the right side carries a retentive stopper that should be avoided. At very high levels the weir becomes more dangerous and warrants extra caution. The weir can be portaged via the island river centre, except at very high levels when this option may not be available. Paddlers should inspect the weir before committing to a line.

The Lazonby to Armathwaite section is suitable for relatively novice paddlers and is often used for introductory open boat trips. More experienced paddlers seeking technical whitewater will find greater challenge in the upper reaches of the river.