Castle Rock is a 4,321-foot (1,317 meter) elevation sandstone summit located in Glen Canyon National Recreation Area, in Kane County of southern Utah.

This iconic landmark of the Lake Powell area is composed primarily of Entrada Sandstone.

[3] This sandstone, which was originally deposited as sandy mud on a tidal flat, is believed to have formed about 160 million years ago during the Jurassic period as a giant sand sea, the largest in Earth's history.

According to the Köppen climate classification system, Castle Rock is located in an arid climate zone with hot, very dry summers, and chilly winters with very little snow.

[4] Spring and fall are the most favorable seasons to visit.