The Nidd has a good head of trout and grayling and is often fishable when the other rivers in the Yorkshire Dales are in flood. The river's flow is interrupted in its headwaters by Angram, Scar House and Gouthwaite reservoirs, and water levels are generally dictated by controlled release from Gouthwaite. It is a relatively small river, covered by a canopy of alder trees for much of its length providing plenty of terrestrials for the fish.
Best methods on the Nidd are dry fly and czech nymph, although spiders and the duo can also be used to good effect in places. Due to the tree cover, wading is a must and should be carried out with care since the limestone bottom contains large rocks and there are some hazardous drop offs.