To get to the site, drive to Gila Bend and get on the I-8 freeway going west toward Yuma. The Sentinel exit is #87, about 30 miles west from Gila Bend. Take the exit and go south, across the railroad tracks. Go straight south on the dirt road and drive 2 miles until you see a large, flat area of the desert to your left, white rocks mark the site. It is before a cattle guard. You are there!
ADVISORY: The Saguaro Astronomy Club advises that before using the Sentinel, AZ site you contact the Maricopa County Sheriff’s office for an assessment of the safety of the site and to advise the sheriff’s office that you will be in that area on your specified dates. You may reach the Maricopa County Sheriff’s Office at (602) 876-1801. Be advised that this site is only a few miles from the Mexican border. You should use the site at your own discretion after consulting with the Maricopa County Sheriff.
If you have a Garmin GPS receiver you can click here to download an Az Observing Site Garmin (.gdb) database file which you can open in MapSource and then send to your GPS unit. This will allow you to invoke your receiver's GoTo functionality to calculate a route to the all of the observing sites we frequent, complete with turn-by-turn directions.