1. The Civil War reached AZ and was fought at Picacho Pass on April 15, 1862 near Picacho Peak in Pinal County.
2. Arizona became the 48th state and last of the contiguous states on February 14, 1912 (Valentine’s Day).
3. The 13 stripes on the Arizona flag represent the original 13 colonies of the USA. The colors of the rays refer to red and yellow in the Spanish flags carried by Coronado when he came to Arizona in 1540. The blue matches the USA flag, and the copper star in the center symbolizes the states copper production.
4. Arizona is the leading copper producer in the USA.
5. Arizona is the 6th largest state in the USA, covering 113,623 square miles.
6. Arizona has 4,119 mountain peaks and 5,005 summits.
7. Arizona has 29 peaks that are more than 10,000 feet in elevation.
8. At 12,633 feet, Mount Humphreys, north of Flagstaff, is the state’s highest mountain.
9. Mount Lemmon, Tucson, in the Santa Catalina Mountains, is the southernmost ski resort in the USA.
10. Kartchner Caverns, located outside of Benson, AZ, was discovered in 1974. It is a massive limestone cave and home to one of the world’s longest stalactites.
11. There are 6 National Forests in AZ.
12. Arizona has 90 wilderness areas, #2 in the USA.
13. Arizona is home to the largest contiguous ponderosa pine forest in the USA.
14. The Saguaro cactus is the largest cactus in the USA, and can live over 150 years. It is native to the Sonoran Desert, which is located in southern Arizona, north of the Mexican border.
15. The Petrified Forest, located not far from Holbrook, AZ and Route 66, contains the USA’s largest deposits of petrified wood.
16. The best-preserved meteor crater on Earth is located outside of Winslow, AZ near nostogic Route 66. While you’re in the area, you can stand on the corner in Winslow, AZ.
17. The longest remaining section of nostalgic Route 66 (established in 1926, Chicago to LA) can be found in Arizona running 158 miles from Ashfork to Topock.
18. Arizona grows enough cotton each year to make one pair of jeans for every person in the USA.
19. When England’s London Bridge was replaced in the 1960s, the original was purchased and reconstructed in Lake Havasu City, Arizona, where it still stands today.
20. The only place in the country where mail is delivered by mule (Mule Mail, Mule Train) is the village of Supai, on the Havasupai Reservation, located at the bottom of the Grand Canyon.
21. Oraibi, a Hopi village located in Navajo County, AZ, is reported to be the oldest continuously occupied village in USA.
22. The 2 largest man made lakes in the USA are located on the Colorado River. Lake Mead (Hoover Dam) located between AZ & NV, and Lake Powell (Glen Canyon Dam) located between AZ & UT.
23. Parker Dam, located on the Colorado River between AZ and CA, is the deepest dam in the world at 320 feet below the original river bed.
24. Palo Verde Nuclear Generating Station, located west of Buckeye, AZ, generates the largest amount of electricity in the USA.
25. Sun City, AZ was the first retirement community in the country built by Del Webb in 1960.
26. The heart (geographic center) of Arizona is located near the community of Mayer, AZ.
27. Prescott, AZ claims to be the home of the world’s oldest rodeo, (July 4, 1888); however, Payson, AZ reports to be the home to the world’s oldest, continuous rodeo (August, 1884).
28. The hottest temperature on record in AZ was at Lake Havasu City on June 29, 1994, hitting 128 degrees,
29. The coldest temperature on record in AZ was – 40 degrees at Hawley Lake, located in the White Mountains, on January 7, 1971.
30. You can legally open carry a firearm on your person.

The above information came from various internet search results, and my personal travels around Arizona.