Crimple Beck or the River Crimple is a beck which flows through North Yorkshire, England. It is a tributary of the River Nidd which it joins between Little Ribston and Walshford north of Wetherby. The beck is 15.5 miles (24.9 km) long, and has a total catchment area of 80 square kilometres (31 sq mi), which drains the area around Harrogate. Its tributaries include the Park Beck.