Winnats Pass is a hill pass and limestone gorge in the Peak District of Derbyshire, England. The name is a corruption of 'wind gates' due to the swirling winds through the pass. It lies west of the village of Castleton, in the National Trust's High Peak Estate and the High Peak borough of Derbyshire. The road winds through a cleft, surrounded by high limestone ridges. At the foot of the pass is the entrance to Speedwell Cavern, a karst cave accessed through a flooded lead mine, and which is a popular tourist attraction.
In the 1930s Winnats Pass was the location used for annual access relays in support of greater access to the moorlands or the Peak District, around the time of the Mass Trespass of Kinder Scout. At their peak these were attended by up to 10,000 people.
The gorge of Winnats Pass was once thought to have originated as a giant collapsed cavern; however, this idea has since been superseded. Winnats Pass can be seen to cut steeply down through Lower Carboniferous limestone rocks. These were formed approximately 340 million years ago as a reef fringing a shallow lagoon, with deeper water beyond.