Gilhooley Tower is a basalt spire in the Olympic Mountains and is located in Jefferson County of Washington state.

Its nearest higher peak is Mount Deception at 0.13 mi (0.21 km) to the southeast.

[4] Weather fronts originating in the Pacific Ocean travel northeast toward the Olympic Mountains.

As fronts approach, they are forced upward by the peaks (orographic lift), causing them to drop their moisture in the form of rain or snow.

As a result, the Olympics experience high precipitation, especially during the winter months in the form of snowfall.