The Peel River is a 210-kilometre watercourse in the North West Slopes and Plains district of New South Wales, forming part of the Namoi catchment within the Murray-Darling basin. Rising on the northern slopes of the Liverpool Range at an elevation of 743 metres, the river drops 457 metres over its course before reaching its mouth at the confluence with the Namoi River, south of Keepit Dam. It passes through or near the villages of Nundle, Woolomin, and Piallamore, and flows through Chaffey Dam along its route.

Flow conditions on the Peel River are closely tied to water releases, particularly environmental flows from Chaffey Dam. During drought periods, paddlers have specifically chased these environmental releases to find navigable water, meaning trip planning should account for current dam release schedules rather than assuming consistent natural flow. The river can run low or dry between releases.

One stretch of the river offers kayaking through a submerged forest, where standing dead timber creates an unusual paddling environment. Wildlife along the river includes kangaroos and a variety of bird species, making it of interest to naturalists. The river's character in this area lends itself to relaxed, flat-water paddling rather than technical whitewater.

The Peel River was first identified by European settlers in 1818 when explorer John Oxley named it in honour of British politician Sir Robert Peel.