Caballo Lake a rest stop during their travels, and eagles are often seen in the area. Caballo Lake is named for the Caballo Mountains that border the lake to the northeast, east, and southeast, in which wild horses roamed; Caballo means "horse" in Spanish. The upper area of the lake is very shallow and in recent years has been blocked from the lower, deeper end of the lake. The water has a slightly brownish hue from a distance, due to the shallow waters (usually about at the deepest point). The beaches of Caballo are rocky when compared to Elephant Butte Reservoir, but
Caballo Island rims of the Corregidor Caldera. The gap between the two islands is only about 1/4 mile with a depth of 7 fathoms and is never used for large vessel navigation. The island is currently occupied by the Philippine Navy and is off limits to civilians. Remains of the old fortifications, batteries and structures are left rusting in the open after it was abandoned after World War II. In November 2014, Filipino peacekeepers from Liberia who were quarantined on the island for 21 days due to concerns about Ebola were cleared to return to the mainland. Caballo Island Caballo Island (which