This from an article on Squaw Peak in The Arizona Republic last spring:
In December 1944, during World War II, 25 German soldiers escaped from a POW camp set up in Papago Park [Phoenix]. Some of the escapees intended to float a boat down the Salt River, which they had seen only on maps. They were sorely disappointed when they discovered that the river was dry. All the prisoners were quickly captured, except for their leader, a U-boat captain, who hid for a month in a cave on Squaw Peak before he was recaptured.