English: Ulubey Canyon Nature Park (Turkish: Ulubey Kanyonu Tabiat Parkı) is a nature park in the Ulubey and Karahallı districts of Uşak Province, Turkey. The canyon is the second longest in the world after the Grand Canyon in the United States. The park provides suitable habitat for many species of animals and plants and is being developed as a centre for ecotourism. Being in a transitional zone between the Aegean and Central Anatolia regions, Uşak Province exhibits the climate characteristics of both regions. The summer months are warmer and more arid than in the Aegean region, and the winter season is milder than in the Central Anatolian region. Rain brought by air masses from over the Aegean Sea generates a more humid climate than in Central Anatolia. Average annual precipitation is 551 mm (21.7 in). Monthly or seasonal distribution of precipitation is irregular.