Summerhaven is a small unincorporated community and census-designated place (CDP) on Mount Lemmon in the Santa Catalina Mountains north of Tucson in Pima County, Arizona, United States.

White Anglo-Americans originally used the area of Summerhaven when the U.S. Army at Fort Lowell in Tucson put a military camp there in its defense against the Apache in the 1870s and 1880s.

The links were about 7,800 feet above sea level, making it the highest golf course in the world...."[4] Summerhaven is located in the Santa Catalina Mountains and is surrounded by pine trees.

Because of the elevation difference between the Tucson area (5,000–6,000 feet), the temperature in Summerhaven will be anywhere from 15–30 degrees F cooler depending on weather patterns, which usually makes it a very comfortable place to be compared to the hot desert heat in the summer time.

October 2010 saw the inaugural running of the Mount Lemmon Marathon, in which nearly 800 participants finished the race from near the start of the Catalina Highway up to Summerhaven.

Arizona Governor Janet Napolitano assessed the damage, and both federal and county officials surveyed the extensive loss.