About Harquahala Peak Observatory
Harquahala Peak Observatory was built in 1920 by the Smithsonian Astrophysical Observatory to measure and record solar activity. Although deserted now, from 1920-1925 a hardy group of scientists lived and worked atop the highest mountain in southwestern Arizona (5,681-foot elevation). How these individuals lived, worked, and relaxed up on this peak, struggling with its seclusion and weather, represents an enlivened story of dedicated scientific pursuit and American inventiveness.Visit the Observatory | History of the ObservatoryVisit the ObservatoryThe observatory is at the top of Harquahala Peak. You can get to the peak via the rugged, 10.5-mile Harquahala Mountain Back Country Byway. A steep hiking trail also leads 5.6 miles to the summit via Harquahala Pack Trail Basecamp Trailhead.Know Before You GoWatch for rattlesnakes and other venomous creatures in the desert.Please do not harass reptiles. Many people are bitten while playing with, collecting, or attempting to kill them.Remnants of prospecting and mining lie near the Observatory and elsewhere in the Harquahala Mountains. Be aware of the danger these remains pose and avoid them when exploring the area.Thunderstorms on Harquahala Peak are often violent and dangerous. Should stormy weather arise during your visit, leave the mountaintop as quickly as possible.
How to Get There
Take Interstate 10 to Salome Road exit. Go north to Eagle Eye Road 9.6 miles then turn right. Go 8.5 miles to the dirt road heading north. Follow the dirt road to the western end of the Harquahala Mountains Wilderness. The byway leading to the observatory is 10.5 miles long and is very rugged and steep in places. Four-wheel drive is required.
Driving directions (Google Maps) →Plan Your Visit to Harquahala Peak Observatory
Heading to Harquahala Peak Observatory? A few things to know before you go:
- Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
- Fees: day-use and camping fees vary; check current rates on the official park page
- Trash & pack-out: follow Leave No Trace principles
- Wildlife: store food in bear boxes where provided; never feed wildlife
- Weather: the 5-day forecast above is updated every 6 hours; verify just before you go
Frequently Asked Questions
Do I need a reservation for Harquahala Peak Observatory?
No central reservation system listed for Harquahala Peak Observatory. Check the official page (https://www.recreation.gov/camping/campgrounds/202055) for the latest entry policy and availability.
How do I get to Harquahala Peak Observatory?
Take Interstate 10 to Salome Road exit. Go north to Eagle Eye Road 9.6 miles then turn right. Go 8.5 miles to the dirt road heading north. Follow the dirt road to the western end of the Harquahala Mountains Wilderness. The byway leading to the observatory is 10.5 miles long and is very rugged and steep in places. Four-wheel drive is required.
How do I contact Harquahala Peak Observatory?
You can reach the park at phone: 602-867-5400 or email: blm_az_pdoweb@blm.gov.
References & Official Resources
